refactor(animations): deport TCB away from animation-land forever (#10892)

* feat(animations): support animation trigger template callbacks

* refactor(animations): deport TCB away from animation-land forever

modules/@angular/core/src/animation/animation_output.ts

@@ -0,0 +1,10 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+export class AnimationOutput {
+  constructor(public name: string, public phase: string, public fullPropertyName: string) {}
+}