can no longer use include_prefix = "" in cc_library with Bazel 6.0.0

### Description of the bug:


We use `include_prefix` in our C++ assets for legacy component laytout. This has stopped working in bazel 6.0.0, although the virtual includes directory is produced. 

If you use `include_prefix = "x"` and `#include  "x/blah.h"` it works.
If you use `includes = ["."]` and `#include "blah.h"` it works.
If you use `include_prefix = ""` and `#include "blah.h"` it fails.

### What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.


```
diff --git a/.bazelversion b/.bazelversion
new file mode 100644
index 0000000..73fcd45
--- /dev/null
+++ b/.bazelversion
@@ -0,0 +1 @@
+6.0.0rc5
\ No newline at end of file
diff --git a/BUILD b/BUILD
new file mode 100644
index 0000000..ff015f9
--- /dev/null
+++ b/BUILD
@@ -0,0 +1,5 @@
+cc_test(
+    name="test",
+    srcs = ["test.cpp"],
+    deps = ["//blah"],
+)
\ No newline at end of file
diff --git a/WORKSPACE b/WORKSPACE
new file mode 100644
index 0000000..e69de29
diff --git a/blah/BUILD b/blah/BUILD
new file mode 100644
index 0000000..08a2dd6
--- /dev/null
+++ b/blah/BUILD
@@ -0,0 +1,6 @@
+cc_library(
+    name = "blah",
+    hdrs = ["blah.h"],
+    include_prefix = "",
+    visibility = ["//:__pkg__"],
+)
diff --git a/blah/blah.h b/blah/blah.h
new file mode 100644
index 0000000..e69de29
diff --git a/test.cpp b/test.cpp
new file mode 100644
index 0000000..6dc850a
--- /dev/null
+++ b/test.cpp
@@ -0,0 +1,5 @@
+#include "blah.h"
+
+int main(){
+    return 0;
+}
\ No newline at end of file

```

### Which operating system are you running Bazel on?


windows

### What is the output of `bazel info release`?


release 6.0.0rc5

### If `bazel info release` returns `development version` or `(@non-git)`, tell us how you built Bazel.


_No response_

### What's the output of `git remote get-url origin; git rev-parse master; git rev-parse HEAD` ?


_No response_

### Have you found anything relevant by searching the web?

_No response_

### Any other information, logs, or outputs that you want to share?

Bazel 6.0.0 output fails...
```
ERROR: C:/dev/test/BUILD:1:8: Compiling test.cpp failed: (Exit 2): cl.exe failed: error executing command (from target //:test)
  cd /d C:/dev/_bazel/l2habeez/execroot/__main__
  SET INCLUDE=C:\bazeltools\vs16\VC\Tools\MSVC\14.29.30133\ATLMFC\include;C:\bazeltools\vs16\VC\Tools\MSVC\14.29.30133\include;C:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\include\um;C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\ucrt;C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\shared;C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\um;C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\winrt;C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\cppwinrt
    SET PATH=C:\bazeltools\vs16\VC\Tools\MSVC\14.29.30133\bin\HostX64\x64;C:\bazeltools\vs16\Common7\IDE\VC\VCPackages;C:\bazeltools\vs16\Common7\IDE\CommonExtensions\Microsoft\TestWindow;C:\bazeltools\vs16\Common7\IDE\CommonExtensions\Microsoft\TeamFoundation\Team Explorer;C:\bazeltools\vs16\MSBuild\Current\bin\Roslyn;C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools\x64\;C:\bazeltools\vs16\Common7\Tools\devinit;C:\Program Files (x86)\Windows Kits\10\bin\10.0.22000.0\x64;C:\Program Files (x86)\Windows Kits\10\bin\x64;C:\bazeltools\vs16\\MSBuild\Current\Bin;C:\Windows\Microsoft.NET\Framework64\v4.0.30319;C:\bazeltools\vs16\Common7\IDE\;C:\bazeltools\vs16\Common7\Tools\;;C:\Windows\system32
    SET PWD=/proc/self/cwd
    SET RUNFILES_MANIFEST_ONLY=1
    SET TEMP=C:\Users\JAMESC~1\AppData\Local\Temp
    SET TMP=C:\Users\JAMESC~1\AppData\Local\Temp
  C:\bazeltools\vs16\VC\Tools\MSVC\14.29.30133\bin\HostX64\x64\cl.exe /nologo /DCOMPILER_MSVC /DNOMINMAX /D_WIN32_WINNT=0x0601 /D_CRT_SECURE_NO_DEPRECATE /D_CRT_SECURE_NO_WARNINGS /bigobj /Zm500 /EHsc /wd4351 /wd4291 /wd4250 /wd4996 /I. /Ibazel-out/x64_windows-fastbuild/bin /Iexternal/bazel_tools /Ibazel-out/x64_windows-fastbuild/bin/external/bazel_tools /DBAZEL_CURRENT_REPOSITORY="" /showIncludes /MD /Od /Z7 /wd4117 -D__DATE__="redacted" -D__TIMESTAMP__="redacted" -D__TIME__="redacted" /Fobazel-out/x64_windows-fastbuild/bin/_objs/test/test.obj /c test.cpp
# Configuration: b67f5ac3d5b94ed15e96cb37e833e7120042529b3e382867f55890fe82af9163
# Execution platform: @local_config_platform//:host
test.cpp(1): fatal error C1083: Cannot open include file: 'blah.h': No such file or directory
INFO: Elapsed time: 1.060s, Critical Path: 0.14s
INFO: 2 processes: 2 internal.                                                                                                                                                                                                               
FAILED: Build did NOT complete successfully
```


Working with Bazel 5.3.2
```
PS C:\dev\test> bazel build ... -s                
Starting local Bazel server and connecting to it...
INFO: Invocation ID: 1a9c33cb-a9f5-4155-8b4b-d7a3931a6f13
INFO: Analyzed 2 targets (48 packages loaded, 681 targets configured).
INFO: Found 2 targets...
SUBCOMMAND: # //:test [action 'Compiling test.cpp', configuration: 8fcc02caf7268a43edcd2a5a3e8e4edfa3c614a84823ca1599fcd30251ebce9f, execution platform: @local_config_platform//:host]
cd /d C:/dev/_bazel/l2habeez/execroot/__main__
  SET INCLUDE=C:\bazeltools\vs16\VC\Tools\MSVC\14.29.30133\ATLMFC\include;C:\bazeltools\vs16\VC\Tools\MSVC\14.29.30133\include;C:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\include\um;C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\ucrt;C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\shared;C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\um;C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\winrt;C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\cppwinrt
    SET PATH=C:\bazeltools\vs16\VC\Tools\MSVC\14.29.30133\bin\HostX64\x64;C:\bazeltools\vs16\Common7\IDE\VC\VCPackages;C:\bazeltools\vs16\Common7\IDE\CommonExtensions\Microsoft\TestWindow;C:\bazeltools\vs16\Common7\IDE\CommonExtensions\Microsoft\TeamFoundation\Team Explorer;C:\bazeltools\vs16\MSBuild\Current\bin\Roslyn;C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools\x64\;C:\bazeltools\vs16\Common7\Tools\devinit;C:\Program Files (x86)\Windows Kits\10\bin\10.0.22000.0\x64;C:\Program Files (x86)\Windows Kits\10\bin\x64;C:\bazeltools\vs16\\MSBuild\Current\Bin;C:\Windows\Microsoft.NET\Framework64\v4.0.30319;C:\bazeltools\vs16\Common7\IDE\;C:\bazeltools\vs16\Common7\Tools\;;C:\Windows\system32
    SET PWD=/proc/self/cwd
    SET RUNFILES_MANIFEST_ONLY=1
    SET TEMP=C:\Users\JAMESC~1\AppData\Local\Temp
    SET TMP=C:\Users\JAMESC~1\AppData\Local\Temp
  C:\bazeltools\vs16\VC\Tools\MSVC\14.29.30133\bin\HostX64\x64\cl.exe /nologo /DCOMPILER_MSVC /DNOMINMAX /D_WIN32_WINNT=0x0601 /D_CRT_SECURE_NO_DEPRECATE /D_CRT_SECURE_NO_WARNINGS /bigobj /Zm500 /EHsc /wd4351 /wd4291 /wd4250 /wd4996 /I. /Ibazel-out/x64_windows-fastbuild/bin /Iexternal/bazel_tools /Ibazel-out/x64_windows-fastbuild/bin/external/bazel_tools /Ibazel-out/x64_windows-fastbuild/bin/blah/_virtual_includes/blah /showIncludes /MD /Od /Z7 /wd4117 -D__DATE__="redacted" -D__TIMESTAMP__="redacted" -D__TIME__="redacted" /Fobazel-out/x64_windows-fastbuild/bin/_objs/test/test.obj /c test.cpp
# Configuration: 8fcc02caf7268a43edcd2a5a3e8e4edfa3c614a84823ca1599fcd30251ebce9f
# Execution platform: @local_config_platform//:host
INFO: Elapsed time: 15.772s, Critical Path: 0.11s
INFO: 2 processes: 1 disk cache hit, 1 internal.
INFO: Build completed successfully, 2 total actions
```


Virtual includes are created, but don't seem to work. 
```
PS C:\dev\test> dir .\bazel-bin\ -r | select -exp fullname
C:\dev\test\bazel-bin\blah
C:\dev\test\bazel-bin\test.exe.runfiles
C:\dev\test\bazel-bin\_objs
C:\dev\test\bazel-bin\test.exe
C:\dev\test\bazel-bin\test.exe-2.params
C:\dev\test\bazel-bin\test.exe.runfiles_manifest
C:\dev\test\bazel-bin\test.pdb
C:\dev\test\bazel-bin\blah\_virtual_includes
C:\dev\test\bazel-bin\blah\_virtual_includes\blah
C:\dev\test\bazel-bin\blah\_virtual_includes\blah\blah.h
C:\dev\test\bazel-bin\test.exe.runfiles\MANIFEST
C:\dev\test\bazel-bin\_objs\test
```


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can no longer use include_prefix = "" in cc_library with Bazel 6.0.0 #17039

Description of the bug:

What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

Which operating system are you running Bazel on?

What is the output of `bazel info release`?

If `bazel info release` returns `development version` or `(@non-git)`, tell us how you built Bazel.

What's the output of `git remote get-url origin; git rev-parse master; git rev-parse HEAD` ?

Have you found anything relevant by searching the web?

Any other information, logs, or outputs that you want to share?

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can no longer use include_prefix = "" in cc_library with Bazel 6.0.0 #17039

Description

Description of the bug:

What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

Which operating system are you running Bazel on?

What is the output of bazel info release?

If bazel info release returns development version or (@non-git), tell us how you built Bazel.

What's the output of git remote get-url origin; git rev-parse master; git rev-parse HEAD ?

Have you found anything relevant by searching the web?

Any other information, logs, or outputs that you want to share?

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions

What is the output of `bazel info release`?

If `bazel info release` returns `development version` or `(@non-git)`, tell us how you built Bazel.

What's the output of `git remote get-url origin; git rev-parse master; git rev-parse HEAD` ?