Configure MSBuild debug path and save any logs

Configure MSBuild debug path and save any logs

We have had many problems in the CI with MSBuild failing, and not
capturing the failure logs.

See https://github.com/dotnet/coreclr/issues/20236.

So, for all msbuild invocations, set MSBUILDDEBUGPATH to a new,
distinguished, subdirectory of the bin\Logs directory, named
"MsbuildDebugLogs". Change the CI to upload any log files found
there.

Commit migrated from https://github.com/dotnet/coreclr/commit/f471342cc072546edf84bb110aa3d2765ad2bb76