refactor(module:grid): refactor control flow component (#8344)

Author: Nicoss54

components/grid/demo/playground.ts

@@ -29,12 +29,17 @@ import { NzMarks } from 'ng-zorro-antd/slider';
 
     <div class="gutter-example">
       <div nz-row [nzGutter]="[hGutter, vGutter]">
-        <div nz-col class="gutter-row" [nzSpan]="24 / count" *ngFor="let i of array">
-          <div class="grid-config">Column</div>
-        </div>
-        <div nz-col class="gutter-row" [nzSpan]="24 / count" *ngFor="let i of array">
-          <div class="grid-config">Column</div>
-        </div>
+        @for (i of array; track i) {
+          <div nz-col class="gutter-row" [nzSpan]="24 / count" *ngFor="let i of array">
+            <div class="grid-config">Column</div>
+          </div>
+        }
+
+        @for (i of array; track i) {
+          <div nz-col class="gutter-row" [nzSpan]="24 / count" *ngFor="let i of array">
+            <div class="grid-config">Column</div>
+          </div>
+        }
       </div>
     </div>
   `,