refactor: Move dom_adapter.ts to @angular/common (#32154)

This work is needed in preparation for turning tokens into tree-shakable injectables.

PR Close #32154

packages/common/test/pipes/async_pipe_spec.ts

@@ -6,10 +6,9 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {AsyncPipe} from '@angular/common';
+import {AsyncPipe, ɵgetDOM as getDOM} from '@angular/common';
 import {EventEmitter, WrappedValue} from '@angular/core';
 import {AsyncTestCompleter, beforeEach, describe, expect, inject, it} from '@angular/core/testing/src/testing_internal';
-import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
 import {browserDetection} from '@angular/platform-browser/testing/src/browser_util';
 
 import {SpyChangeDetectorRef} from '../spies';