build: migrate determining if Ivy is enabled in typescript genrule files to use angular_ivy_enabled (#33983)

Use angular_ivy_enabled to determine if Ivy is being used for the ivy_test_selector.ts symbols.
Additionally, remove the reflect_metadata genrules as we not longer have a "jit" compile option
so all possible invocations result in the same generated file.  Instead we can just commit this
file.

PR Close #33983

packages/core/test/bundling/util/BUILD.bazel

@@ -6,19 +6,9 @@ package(default_visibility = ["//visibility:public"])
 ts_library(
     name = "reflect_metadata",
     srcs = [
-        "src/reflect_metadata_aot.ts",
-        "src/reflect_metadata_jit.ts",
-        "src/reflect_metadata_legacy.ts",
-        ":metadata_switch",
+        "src/reflect_metadata.ts",
     ],
     module_name = "@angular/core/test/bundling/util/src/reflect_metadata",
     module_root = "src/reflect_metadata",
     deps = ["@npm//reflect-metadata"],
 )
-
-# See packages/core/BUILD.bazel.
-genrule(
-    name = "metadata_switch",
-    outs = ["src/reflect_metadata.ts"],
-    cmd = "echo import \"'./reflect_metadata_$(compile)';\" > $@",
-)

packages/core/test/bundling/util/src/reflect_metadata.ts

@@ -6,4 +6,4 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import './reflect_metadata_legacy';
+export const UNUSED = true;

packages/core/test/bundling/util/src/reflect_metadata_aot.ts

@@ -1,9 +0,0 @@
-/**
- * @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 const UNUSED = true;

packages/core/test/bundling/util/src/reflect_metadata_jit.ts

@@ -1,9 +0,0 @@
-/**
- * @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
- */
-
-import 'reflect-metadata';

packages/core/test/bundling/util/src/reflect_metadata_legacy.ts

@@ -1,9 +0,0 @@
-/**
- * @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 const UNUSED = true;