Revert "Update to .NET SDK 6.0.301 (#7724)" (#7742)
Revert "Update to .NET SDK 6.0.301 (#7724)" (#7742)

This reverts commit da837294d1f503ea6728df8bf803a94ae5214848, which caused an internal official build break.
AndyGerlicher/msbuild,AndyGerlicher/msbuild,rainersigwald/msbuild,sean-gilliam/msbuild,sean-gilliam/msbuild,rainersigwald/msbuild,rainersigwald/msbuild,AndyGerlicher/msbuild,sean-gilliam/msbuild,AndyGerlicher/msbuild,sean-gilliam/msbuild,rainersigwald/msbuild