* Added Visual Studio build tools (#55629)

Added description of build tools (CMake, Ninja and Python) installation as Visual Studio Individual Components.
Added emphasis (bold) of Visual Studio installer sections and components (replaces previously used different styles of quotes).

* Removed Python 32-bit VS component

Python 64-bit component is enough for building x86 and x64 target architectures.

Co-authored-by: Juan Hoyos <[email protected]>

1. AppDomain TestingCreateInstanceFromObjectHandle and TestingCreateInstanceFromObjectHandleFullSignature were failing because the assembly file to load has to be case sensitive and wasn't.

2. AppDomain TargetFrameworkTest was permanently skipped

3. StringComparerTests CreateFromCultureAndOptions, CreateFromCultureAndOptionsStringSort, and CreateWithCulturesTest skips testing the turkish culture as it's problematic on Android

4. Environment.Exit ExitCode_VoidMainAppReturnsSetValue was permanently skipped

Fixes #49868

* Resolve MakeGenericType ILLink warning in DependencyInjection

Resolve the ILLink warning in DependencyInjection by adding a runtime check that is behind a new AppContext switch 'Microsoft.Extensions.DependencyInjection.VerifyOpenGenericServiceTrimmability'. The runtime check ensures the trimming annotations on the open generic types are compatible between the service and implementation types. The check is enabled by default when PublishTrimmed=true.

* Make VerifyOpenGenericServiceTrimmability a full feature switch

* Enable trimming TLS arrays in ArrayPool.Shared

Today arrays stored in `ArrayPool<T>.Shared`'s per-core buckets have trimming applied, but arrays stored in the per-thread buckets are only trimmed when there's high memory pressure.  This change enables all buffers to be trimmed (eventually).  Every time our gen2 callback runs, it ensures any non-timestamped buffers have a timestamp, and also ensures that any timestamped buffers are still timely... if any aren't, they're eligible for trimming.  The timestamp is reset for TLS arrays when they're stored, and for per-core buckets when they transition from empty to non-empty; the latter is just a tweak on the current behavior, which incurs the cost of Environment.TickCount upon that transition, whereas now we only pay it as part of the trimming pass.

* Address PR feedback

* Work around bad linker transform

…read (#56531)

* move CanRead and CanWrite checks to FileStream

* don't check IsClosed twice_(FileHandle.CanSeek already contains a IsClosed check)

* add a failing test

* handle incomplete async reads

* don't try to cache file length when file is opened for writing, as updating file position before performing async write can lead to invalid cached length value

* maybe Win 7 & 8 fix

…Completion test

* [mono] Unconditionally enable NEON/AdvSimd for arm64 with LLVM

* Remove `mattr=neon` from the Mono AOT command line arguments for LLVM AOT tests

This is now enabled by default when using LLVM.

#56646)

Co-authored-by: Mitchell Hwang <[email protected]>