fix(language-service): re-add regressed templateUrl tests (#32438)

Commit 18ce58 (per #32378) regressed tests for templateUrl definitions.
This PR re-adds those tests.

PR Close #32438

packages/language-service/test/definitions_spec.ts

@@ -253,4 +253,26 @@ describe('definitions', () => {
       // Not asserting the textSpan of definition because it's external file
     }
   });
+
+  it('should be able to find a template from a url', () => {
+    const fileName = mockHost.addCode(`
+	      @Component({
+	        templateUrl: './«test».ng',
+	      })
+	      export class MyComponent {}`);
+
+    const marker = mockHost.getReferenceMarkerFor(fileName, 'test');
+    const result = ngService.getDefinitionAt(fileName, marker.start);
+
+    expect(result).toBeDefined();
+    const {textSpan, definitions} = result !;
+
+    expect(textSpan).toEqual({start: marker.start - 2, length: 9});
+
+    expect(definitions).toBeDefined();
+    expect(definitions !.length).toBe(1);
+    const [def] = definitions !;
+    expect(def.fileName).toBe('/app/test.ng');
+    expect(def.textSpan).toEqual({start: 0, length: 0});
+  });
 });