perf(compiler): skip type check and emit in bazel in some cases. (#19646)

If no user files changed:
- only type check the changed generated files

Never emit non changed generated files
- we still calculate them, but don’t send them through
  TypeScript to emit them but cache the written files instead.
PR Close #19646

packages/compiler-cli/src/ngtools_api2.ts

@@ -103,8 +103,7 @@ export interface Program {
   getNgStructuralDiagnostics(cancellationToken?: ts.CancellationToken): Diagnostic[];
   getTsSemanticDiagnostics(sourceFile?: ts.SourceFile, cancellationToken?: ts.CancellationToken):
       ts.Diagnostic[];
-  getNgSemanticDiagnostics(fileName?: string, cancellationToken?: ts.CancellationToken):
-      Diagnostic[];
+  getNgSemanticDiagnostics(genFile?: any, cancellationToken?: ts.CancellationToken): Diagnostic[];
   loadNgStructureAsync(): Promise<void>;
   emit({emitFlags, cancellationToken, customTransformers, emitCallback}: {
     emitFlags?: EmitFlags,