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/forms/test/template_integration_spec.ts

@@ -6,11 +6,11 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
+import {ɵgetDOM as getDOM} from '@angular/common';
 import {Component, Directive, Type, forwardRef} from '@angular/core';
 import {ComponentFixture, TestBed, async, fakeAsync, tick} from '@angular/core/testing';
 import {AbstractControl, AsyncValidator, COMPOSITION_BUFFER_MODE, FormControl, FormsModule, NG_ASYNC_VALIDATORS, NgForm, NgFormSelectorWarning, NgModel} from '@angular/forms';
 import {By} from '@angular/platform-browser/src/dom/debug/by';
-import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
 import {dispatchEvent, sortedClassList} from '@angular/platform-browser/testing/src/browser_util';
 import {merge} from 'rxjs';