[chore] Improve request cancelation handling in vis embeddable (#65057) (#65637)

Author: Dosant

src/plugins/visualizations/public/embeddable/visualize_embeddable.ts

@@ -340,13 +340,14 @@ export class VisualizeEmbeddable extends Embeddable<VisualizeInput, VisualizeOut
       this.abortController.abort();
     }
     this.abortController = new AbortController();
+    const abortController = this.abortController;
     this.expression = await buildPipeline(this.vis, {
       timefilter: this.timefilter,
       timeRange: this.timeRange,
       abortSignal: this.abortController!.signal,
     });
 
-    if (this.handler) {
+    if (this.handler && !abortController.signal.aborted) {
       this.handler.update(this.expression, expressionParams);
     }
   }