Adhoc artifacts / packages / distribtests run: https://fusion2.corp.google.com/invocations/ae11738c-74a6-4604-aae4-cf957090e991/targets

I will add info about Grpc.Core size difference once the package build finishes.

CC @jskeet

Issue with stripping linux aarch64 library (since aarch64 library cannot be stripped on x64?)

+ strip --strip-unneeded libgrpc_csharp_ext.so
strip: Unable to recognise the format of the input file `libgrpc_csharp_ext.so'
+ FAILED=true
+ '[' artifacts '!=' '' ']'
+ mkdir -p /tmpfs/src/github/grpc/artifacts
+ docker cp build_and_run_docker_4872eb47-0a97-41df-8cac-55472d75dc16:/var/local/git/grpc/artifacts /tmpfs/src/github/grpc
Error: No such container:path: build_and_run_docker_4872eb47-0a97-41df-8cac-55472d75dc16:/var/local/git/grpc/artifacts
+ FAILED=true
+ docker rm -f build_and_run_docker_4872eb47-0a97-41df-8cac-55472d75dc16
build_and_run_docker_4872eb47-0a97-41df-8cac-55472d75dc16
+ '[' true '!=' '' ']'
+ exit 1

2021-03-17 01:51:49,228 FAILED: build_artifact.csharp_ext_linux_aarch64 [ret=1, pid=7822, time=847.3sec]

Another run of adhoc artifacts / packages / distribtests: https://fusion2.corp.google.com/invocations/238d80d1-5d4c-4a63-b4e2-a3a9031ce9d8/targets

Grpc.Core size reduction is quite significant: 74MB -> 14MB
on the other hand, the size of Grpc.Core.NativeDebug has increased from 41MB to 106MB (as expected).

All the C# distribtests are still passing.

Adhoc build of the nuget packages is here:
https://console.cloud.google.com/storage/browser/grpc-testing-kokoro-prod/test_result_public/prod/grpc/core/master/linux/grpc_build_packages/15988/20210317-112510

CC @jskeet as this PR leads to significant decrease of Grpc.Core size (it's now 14MB).

Wahoo - that's great news :)

Nightly build of the packages is here:
https://packages.grpc.io/archive/2021/03/a98819007d32820bbd09fa98efbe17b2a65e808a-3d844ed3-2714-48a8-b126-043f416ff665/index.xml

This is again broken in the latest Prpc.Core 2.42.0 and 2.43.0-pre1 nugets. libgrpc_csharp_ext.so is once again 107MB!

libgrpc_csharp_ext.x64.so in Grpc.Core NuGet package is huge (115 MB) #25862

I don't think that's true. See
#25862 (comment)