refactor(cdk-experimental/table-scroll-container): switch to standalone

Reworks `cdk-experimental/table-scroll-container` to support standalone.

Author: crisbeto

src/cdk-experimental/table-scroll-container/table-scroll-container-module.ts

@@ -11,7 +11,7 @@ import {NgModule} from '@angular/core';
 import {CdkTableScrollContainer} from './table-scroll-container';
 
 @NgModule({
-  declarations: [CdkTableScrollContainer],
+  imports: [CdkTableScrollContainer],
   exports: [CdkTableScrollContainer],
 })
 export class CdkTableScrollContainerModule {}

src/cdk-experimental/table-scroll-container/table-scroll-container.spec.ts

@@ -23,8 +23,7 @@ describe('CdkTableScrollContainer', () => {
     declarations: any[] = [],
   ): ComponentFixture<T> {
     TestBed.configureTestingModule({
-      imports: [CdkTableModule, CdkTableScrollContainerModule],
-      declarations: [componentType, ...declarations],
+      imports: [CdkTableModule, CdkTableScrollContainerModule, componentType, ...declarations],
     }).compileComponents();
 
     return TestBed.createComponent<T>(componentType);
@@ -275,6 +274,8 @@ class FakeDataSource extends DataSource<TestData> {
     </table>
     </div>
   `,
+  standalone: true,
+  imports: [CdkTableModule, CdkTableScrollContainerModule],
   styles: [
     `
     .cdk-header-cell, .cdk-cell, .cdk-footer-cell {

src/cdk-experimental/table-scroll-container/table-scroll-container.ts

@@ -36,6 +36,7 @@ let nextId = 0;
     'class': 'cdk-table-scroll-container',
   },
   providers: [{provide: STICKY_POSITIONING_LISTENER, useExisting: CdkTableScrollContainer}],
+  standalone: true,
 })
 export class CdkTableScrollContainer implements StickyPositioningListener, OnDestroy, OnInit {
   private readonly _uniqueClassName: string;