Rebootstrap the VMR

[ellahathaway]

Once dotnet/installer#19612 is merged and a build has been completed with the changes, the VMR needs to be rebootstrapped in order to resolve dotnet/sdk#40572 (comment).

dotnet/installer#19683 needs to be reverted after the rebootstrap as well.

Will close after we rebootstrap again and dotnet/installer#19683 gets reverted (for sdk)

[ellahathaway]

The build that I was going to pull the artifacts from failed when building Roslyn in Stage 2:

##[error]/vmr/src/roslyn/src/Workspaces/SharedUtilitiesAndExtensions/Workspace/Core/CodeGeneration/CodeGenerationHelpers.cs(74,27): error CS0121: (NETCORE_ENGINEERING_TELEMETRY=Build) The call is ambiguous between the following methods or properties: 'string.Join(string?, ReadOnlySpan<object?>)' and 'string.Join(string?, ReadOnlySpan<string?>)'

If we rebootstrap, all the Stage 1 builds will fail with this same error.

cc @ViktorHofer @dotnet/source-build-internal

[ViktorHofer]

Let's try to get dotnet/installer#19594 in and then make a re-bootstrap. That includes the roslyn fix.

Ideally we would then send re-boostrap PRs into both sdk and installer.

[MichaelSimons]

All required rebootstrapping work is complete. Closing.