Halve the time it takes to run formatting unit tests (#11173)

Turns out the boolean parameter passed in here is read in exactly one
spot in our code, and that line of code is never hit in these tests
because they use mocks.

Yes, this is the equivalent of removing a `Thread.Sleep` that was put in
previously, but I'm taking it regardless :)

Author: davidwengier

src/Razor/test/Microsoft.AspNetCore.Razor.LanguageServer.Test/Formatting_NetFx/FormattingTestBase.cs

@@ -59,8 +59,7 @@ private protected async Task RunFormattingTestAsync(
         bool skipFlipLineEndingTest = false)
     {
         // Run with and without forceRuntimeCodeGeneration
-        await RunFormattingTestInternalAsync(input, expected, tabSize, insertSpaces, fileKind, tagHelpers, allowDiagnostics, razorLSPOptions, inGlobalNamespace, forceRuntimeCodeGeneration: true);
-        await RunFormattingTestInternalAsync(input, expected, tabSize, insertSpaces, fileKind, tagHelpers, allowDiagnostics, razorLSPOptions, inGlobalNamespace, forceRuntimeCodeGeneration: false);
+        await RunFormattingTestInternalAsync(input, expected, tabSize, insertSpaces, fileKind, tagHelpers, allowDiagnostics, razorLSPOptions, inGlobalNamespace);
 
         // some tests are failing, skip for now, tracked by https://github.com/dotnet/razor/issues/10836
         if (!skipFlipLineEndingTest)
@@ -69,12 +68,11 @@ private protected async Task RunFormattingTestAsync(
             input = FlipLineEndings(input);
             expected = FlipLineEndings(expected);
 
-            await RunFormattingTestInternalAsync(input, expected, tabSize, insertSpaces, fileKind, tagHelpers, allowDiagnostics, razorLSPOptions, inGlobalNamespace, forceRuntimeCodeGeneration: true);
-            await RunFormattingTestInternalAsync(input, expected, tabSize, insertSpaces, fileKind, tagHelpers, allowDiagnostics, razorLSPOptions, inGlobalNamespace, forceRuntimeCodeGeneration: false);
+            await RunFormattingTestInternalAsync(input, expected, tabSize, insertSpaces, fileKind, tagHelpers, allowDiagnostics, razorLSPOptions, inGlobalNamespace);
         }
     }
 
-    private async Task RunFormattingTestInternalAsync(string input, string expected, int tabSize, bool insertSpaces, string? fileKind, ImmutableArray<TagHelperDescriptor> tagHelpers, bool allowDiagnostics, RazorLSPOptions? razorLSPOptions, bool inGlobalNamespace, bool forceRuntimeCodeGeneration)
+    private async Task RunFormattingTestInternalAsync(string input, string expected, int tabSize, bool insertSpaces, string? fileKind, ImmutableArray<TagHelperDescriptor> tagHelpers, bool allowDiagnostics, RazorLSPOptions? razorLSPOptions, bool inGlobalNamespace)
     {
         // Arrange
         fileKind ??= FileKinds.Component;
@@ -89,7 +87,7 @@ private async Task RunFormattingTestInternalAsync(string input, string expected,
 
         var path = "file:///path/to/Document." + fileKind;
         var uri = new Uri(path);
-        var (codeDocument, documentSnapshot) = CreateCodeDocumentAndSnapshot(source, uri.AbsolutePath, tagHelpers, fileKind, allowDiagnostics, inGlobalNamespace, forceRuntimeCodeGeneration);
+        var (codeDocument, documentSnapshot) = CreateCodeDocumentAndSnapshot(source, uri.AbsolutePath, tagHelpers, fileKind, allowDiagnostics, inGlobalNamespace);
         var options = new FormattingOptions()
         {
             TabSize = tabSize,
@@ -248,7 +246,7 @@ protected async Task RunCodeActionFormattingTestAsync(
     protected static TextEdit Edit(int startLine, int startChar, int endLine, int endChar, string newText)
         => VsLspFactory.CreateTextEdit(startLine, startChar, endLine, endChar, newText);
 
-    private static (RazorCodeDocument, IDocumentSnapshot) CreateCodeDocumentAndSnapshot(SourceText text, string path, ImmutableArray<TagHelperDescriptor> tagHelpers = default, string? fileKind = default, bool allowDiagnostics = false, bool inGlobalNamespace = false, bool forceRuntimeCodeGeneration = false)
+    private static (RazorCodeDocument, IDocumentSnapshot) CreateCodeDocumentAndSnapshot(SourceText text, string path, ImmutableArray<TagHelperDescriptor> tagHelpers = default, string? fileKind = default, bool allowDiagnostics = false, bool inGlobalNamespace = false)
     {
         fileKind ??= FileKinds.Component;
         tagHelpers = tagHelpers.NullToEmpty();
@@ -291,7 +289,7 @@ @using Microsoft.AspNetCore.Components.Web
             new TestRazorProjectItem(importsPath, fileKind: FileKinds.ComponentImport)]);
 
         var projectEngine = RazorProjectEngine.Create(
-            new RazorConfiguration(RazorLanguageVersion.Latest, "TestConfiguration", Extensions: [], LanguageServerFlags: new LanguageServerFlags(forceRuntimeCodeGeneration)),
+            new RazorConfiguration(RazorLanguageVersion.Latest, "TestConfiguration", Extensions: []),
             projectFileSystem,
             builder =>
             {