Re-add EA.RazorCompiler IVT

[jjonescz]

Fixes #72015.

[jasonmalinowski]

You may want to add a comment why this is here.

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[JoeRobich]

I merged my PR with the project load tests. Will need to merge in main and remove the ignored diagnostics.

Lines

roslyn/src/Workspaces/MSBuildTest/NewlyCreatedProjectsFromDotNetNew.cs

Lines 68 to 80 in d8f4c5e

	var ignoredDiagnostics = templateName switch
	{
	"blazor" or "blazorwasm" or "blazorwasm-empty" =>
	[
	// The type or namespace name {'csharp_blazor_project'|'App'} could not be found
	// (are you missing a using directive or an assembly reference?)
	// Bug: https://github.com/dotnet/roslyn/issues/72015
	"CS0246",
	],
	_ => Array.Empty<string>(),
	};
	await AssertTemplateProjectLoadsCleanlyAsync(templateName, LanguageNames.CSharp, ignoredDiagnostics);

can become

await AssertTemplateProjectLoadsCleanlyAsync(templateName, LanguageNames.CSharp);

[jjonescz]

@JoeRobich would it be easy to create similar test that's frozen to net8 to ensure we keep supporting this scenario?

[JoeRobich]

We have a tracking issue (#72071) to expand the test coverage to cover more SDKs. Right now we are just validating it works with our pinned SDK, which is a start. =)