simplify CreateTempSubdirectory

[kasperk81]

InternalAbstractions netstandard support is only needed by Microsoft.NET.TestFramework.csproj. for that CreateTempSubdirectory is using p/invoke for all dependents

making InternalAbstractions multi-framework same as Microsoft.NET.TestFramework.csproj to simplify CreateTempSubdirectory and deleting unused methods

#45631

[kasperk81]

@marcpopMSFT @baronfel can we backport it to 9.0.2xx?

[nagilson]

Please see my comment on #45631 (comment)

[kasperk81]

updated. it guarantees the desired file mode is set on unix without pinvoke

[nagilson]

Thank you for this fix and your patience in the review process 👏

[nagilson]

Failed Microsoft.DotNet.Tests.JoinVerticalsTests.JoinVerticalsCheckAllAmbiguitiesTest [51 ms] Error Message: Assert.DoesNotContain() Failure: Filter matched in collection

System.InvalidOperationException : Failed to execute /__w/1/vmr/artifacts/obj/extracted-dotnet-sdk/dotnet new globaljson --sdk-version 10.0.100-preview.3.25169.1

@dotnet/source-build May you PTAL at these failures?

[ellahathaway]

Failed Microsoft.DotNet.Tests.JoinVerticalsTests.JoinVerticalsCheckAllAmbiguitiesTest [51 ms] Error Message: Assert.DoesNotContain() Failure: Filter matched in collection

System.InvalidOperationException : Failed to execute /__w/1/vmr/artifacts/obj/extracted-dotnet-sdk/dotnet new globaljson --sdk-version 10.0.100-preview.3.25169.1

@dotnet/source-build May you PTAL at these failures?

See dotnet/source-build#4952

[kasperk81]

thanks for syncing with main @nagilson

[kasperk81]

@nagilson #45633 related pr replacing direct libc calls leftover from old days. ptal

[nagilson]

@kasperk81 I believe that PR links to this one, your activity is private, and I didnt see any other SDK PRS from you, which one did you mean?

[kasperk81]

oh sorry i meant #45637