test: added a validation post fork (#34857)

Added validation post fork app for one of the RBAC test
EE PR: https://github.com/appsmithorg/appsmith-ee/pull/4689

/ok-to-test tags="@tag.All"



<!-- This is an auto-generated comment: Cypress test results  -->
> [!TIP]
> 🟢 🟢 🟢 All cypress tests have passed! 🎉 🎉 🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/9875287311>
> Commit: e70666d24fe5ed382827c28246752e7ee060b0e6
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=9875287311&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.All`
> Spec:
> <hr>Wed, 10 Jul 2024 14:38:50 UTC
<!-- end of auto-generated comment: Cypress test results  -->


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Improved user experience by ensuring the page waits until the fork
modal disappears after clicking the "Fork" button.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

app/client/cypress/support/Pages/HomePage.ts

@@ -754,6 +754,7 @@ export class HomePage {
     }
     this.agHelper.ClickButton("Fork");
     this.assertHelper.AssertNetworkStatus("getWorkspace");
+    this.agHelper.WaitUntilEleDisappear(this._forkModal);
   }
 
   public DeleteApplication(appliName: string) {