Investigate poison SBRP assemblies for .NET 8

[mthalman]

From #2817 (comment):

<PrebuiltLeakReport>
  <File Path="artifacts/x64/Release/dotnet-sdk-8.0.100-rtm.23519.1-fedora.38-x64.tar.gz/sdk/8.0.100-rtm.23519.1/DotnetTools/dotnet-format/Microsoft.Bcl.AsyncInterfaces.dll">
    <Hash>284daa41505d15084ed612d1e6af070847770f7bc0518b44c1ab9f0d58a771e6</Hash>
    <Type>SourceBuildReferenceAssembly</Type>
  </File>
  <File Path="artifacts/x64/Release/Private.SourceBuilt.Artifacts.8.0.100-rtm.23519.1.fedora.38-x64.tar.gz/dotnet-format.8.0.447701.nupkg/tools/net8.0/any/Microsoft.Bcl.AsyncInterfaces.dll">
    <Hash>284daa41505d15084ed612d1e6af070847770f7bc0518b44c1ab9f0d58a771e6</Hash>
    <Type>SourceBuildReferenceAssembly</Type>
  </File>
  <File Path="artifacts/x64/Release/Private.SourceBuilt.Artifacts.8.0.100-rtm.23519.1.fedora.38-x64.tar.gz/Microsoft.TestPlatform.CLI.17.8.0-release-23468-02.nupkg/contentFiles/any/net8.0/Microsoft.Extensions.DependencyModel.dll">
    <Hash>3961408c6033157f4c612b56247b35c3ad28dac0b26f95a6fe55315f440a48eb</Hash>
    <Type>SourceBuildReferenceAssembly</Type>
  </File>
  <File Path="artifacts/x64/Release/Private.SourceBuilt.Artifacts.8.0.100-rtm.23519.1.fedora.38-x64.tar.gz/Microsoft.TestPlatform.CLI.17.8.0-release-23468-02.nupkg/contentFiles/any/net8.0/Microsoft.Extensions.FileSystemGlobbing.dll">
    <Hash>c977541cc74cf1f12ba2e74d78595f8c5ced776cda3a41c752fb3a1f787433d6</Hash>
    <Type>SourceBuildReferenceAssembly</Type>
  </File>
</PrebuiltLeakReport>

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[MichaelSimons]

@NikolaMilosavljevic, Can you investigate the source of these? TIA

[mthalman]

I've already identified Microsoft.Bcl.AsyncInterfaces.dll in format and will be submitting a PR shortly. But feel free to continue investigating tomorrow if you have time since I'll be out.

[NikolaMilosavljevic]

I have a PR for 2 vstest leaks: microsoft/vstest#4718