[release/6.0] source-build: support building runtime using non-portable runtime packages (backport of #75597)#77509

carlossanlop merged 1 commit intodotnet:release/6.0dotnet/runtime:release/6.0from

ayakael:backport/pr-75597-to-release/6.0ayakael/runtime:backport/pr-75597-to-release/6.0Copy head branch name to clipboard