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/a11y/a11y-title.directive.ts

@@ -4,7 +4,6 @@ import { Directive, ElementRef, Input, OnInit, Renderer2 } from "@angular/core";
 
 @Directive({
   selector: "[appA11yTitle]",
-  standalone: true,
 })
 export class A11yTitleDirective implements OnInit {
   @Input() set appA11yTitle(title: string) {