test(language-service): Inline test cases in parsing-cases.ts (#36495)

This commit removes individual components from parsing-cases.ts and
colocate them with the actual tests. This makes the tests more readable.

PR Close #36495

packages/language-service/test/project/app/main.ts

@@ -16,16 +16,13 @@ import * as ParsingCases from './parsing-cases';
   imports: [CommonModule, FormsModule],
   declarations: [
     AppComponent,
-    ParsingCases.AsyncForUsingComponent,
     ParsingCases.CaseIncompleteOpen,
     ParsingCases.CaseMissingClosing,
     ParsingCases.CaseUnknown,
     ParsingCases.CounterDirective,
-    ParsingCases.EmptyInterpolation,
     ParsingCases.HintModel,
     ParsingCases.NoValueAttribute,
     ParsingCases.NumberModel,
-    ParsingCases.References,
     ParsingCases.StringModel,
     ParsingCases.TemplateReference,
     ParsingCases.TestComponent,