Remove standalone true from platform and UIF (#15032)

Remove standalone: true from every instance since it's the default as of Angular 19.

libs/components/src/tabs/shared/tab-list-item.directive.ts

@@ -9,7 +9,6 @@ import { Directive, ElementRef, HostBinding, Input } from "@angular/core";
  */
 @Directive({
   selector: "[bitTabListItem]",
-  standalone: true,
 })
 export class TabListItemDirective implements FocusableOption {
   @Input() active: boolean;