fix(grid): correct action strip visibility logic for pinned rows

Author: IMinchev64

projects/igniteui-angular/src/lib/grids/grid-base.directive.ts

@@ -7836,7 +7836,7 @@ export abstract class IgxGridBaseDirective implements GridType,
         const keepActionStrip =
             !!context?.pinned &&
             !!contextEl?.isConnected &&
-            !!context?.asMenuItems;
+            !context?.asMenuItems;
 
         if (!keepActionStrip) {
             if (this.actionStrip) {