[CL-155] Add support for hiding the close button on banner (#7142)

libs/components/src/banner/banner.component.ts

@@ -17,6 +17,7 @@ export class BannerComponent implements OnInit {
   @Input("bannerType") bannerType: BannerTypes = "info";
   @Input() icon: string;
   @Input() useAlertRole = true;
+  @Input() showClose = true;
 
   @Output() onClose = new EventEmitter<void>();