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/popover/popover-trigger-for.directive.ts

@@ -19,7 +19,6 @@ import { PopoverComponent } from "./popover.component";
 
 @Directive({
   selector: "[bitPopoverTriggerFor]",
-  standalone: true,
   exportAs: "popoverTrigger",
 })
 export class PopoverTriggerForDirective implements OnDestroy, AfterViewInit {

libs/components/src/popover/popover.component.ts

@@ -8,7 +8,6 @@ import { SharedModule } from "../shared/shared.module";
 import { TypographyModule } from "../typography";
 
 @Component({
-  standalone: true,
   selector: "bit-popover",
   imports: [A11yModule, IconButtonModule, SharedModule, TypographyModule],
   templateUrl: "./popover.component.html",