fix(ivy): ensure that changes to component resources trigger incremental builds (#30954)

Optimizations to skip compiling source files that had not changed
did not account for the case where only a resource file changes,
such as an external template or style file.

Now we track such dependencies and trigger a recompilation
if any of the previously tracked resources have changed.

This will require a change on the CLI side to provide the list of
resource files that changed to trigger the current compilation by
implementing `CompilerHost.getModifiedResourceFiles()`.

Closes #30947

PR Close #30954

packages/compiler-cli/src/transformers/api.ts

@@ -281,6 +281,12 @@ export interface CompilerHost extends ts.CompilerHost {
    * rather than by path. See http://requirejs.org/docs/whyamd.html#namedmodules
    */
   amdModuleName?(sf: ts.SourceFile): string|undefined;
+
+  /**
+   * Get the absolute paths to the changed files that triggered the current compilation
+   * or `undefined` if this is not an incremental build.
+   */
+  getModifiedResourceFiles?(): Set<string>|undefined;
 }
 
 export enum EmitFlags {