test: Cypress | CI Flaky fix (#28700)

## Description
- This PR fixes /SetProperty/WidgetPropertySetters2_spec.ts flaky CI
behavior
-

#### Type of change
- Script fix (non-breaking change which fixes an issue)

## Testing

#### How Has This Been Tested?
- [X] Cypress CI runs

## Checklist:
#### QA activity:
- [X] Added `Test Plan Approved` label after Cypress tests were reviewed

app/client/cypress/e2e/Regression/ClientSide/SetProperty/WidgetPropertySetters2_spec.ts

@@ -207,6 +207,7 @@ describe("Widget Property Setters - Part II - Tc #2409", () => {
       false,
     );
     deployMode.DeployApp();
+    agHelper.Sleep(3000); //for the Api to run & button to disappear, for CI runs
     agHelper.AssertElementAbsence(
       locators._widgetInDeployed(draggableWidgets.BUTTON),
     );