fix(module:resizable): fix pointer capture bug (#8169)

Author: HyperLife1119

components/resizable/resize-handle.component.ts

@@ -102,11 +102,11 @@ export class NzResizeHandleComponent implements OnInit {
 
   @HostListener('pointerdown', ['$event'])
   onPointerDown(event: PointerEvent): void {
-    this.host.nativeElement.setPointerCapture(event.pointerId);
+    (event.target as HTMLElement).setPointerCapture(event.pointerId);
   }
 
   @HostListener('pointerup', ['$event'])
   onPointerUp(event: PointerEvent): void {
-    this.host.nativeElement.releasePointerCapture(event.pointerId);
+    (event.target as HTMLElement).releasePointerCapture(event.pointerId);
   }
 }