refactor(core): move renderer2 migration lint rule into google3 folder (#31817)

Moves the `renderer_to_renderer2` migration google3 tslint rule
into the new `google3` directory. This is done for consistency
as we recently moved all google3 migration rules into a new
`google3` folder (see: f69e4e6f77).

PR Close #31817

packages/core/schematics/test/google3/BUILD.bazel

@@ -6,7 +6,6 @@ ts_library(
     srcs = glob(["**/*.ts"]),
     deps = [
         "//packages/core/schematics/migrations/google3",
-        "//packages/core/schematics/migrations/renderer-to-renderer2/google3",
         "@npm//@types/shelljs",
         "@npm//tslint",
     ],

packages/core/schematics/test/google3/renderer_to_renderer2_spec.ts

@@ -12,8 +12,8 @@ import * as shx from 'shelljs';
 import {Configuration, Linter} from 'tslint';
 
 describe('Google3 Renderer to Renderer2 TSLint rule', () => {
-  const rulesDirectory = dirname(
-      require.resolve('../../migrations/renderer-to-renderer2/google3/rendererToRenderer2Rule'));
+  const rulesDirectory =
+      dirname(require.resolve('../../migrations/google3/rendererToRenderer2Rule'));
 
   let tmpDir: string;