fix(e2e): increase timeout for flaky orchestrator RBAC admin visibility test

Increase visibility timeout from 10s to 20s in the test that verifies
rhdh-qe-2 admin user can see rhdh-qe's workflow instances in the runs list.

The test was occasionally timing out at 10s when checking if the instance
link becomes visible after admin login.

Test: 'rhdh-qe-2 admin user can see rhdh-qe's workflow instance in runs list'

Author: chadcrum

e2e-tests/playwright/e2e/plugins/orchestrator/orchestrator-rbac.spec.ts

@@ -1497,7 +1497,7 @@ test.describe.serial("Test Orchestrator RBAC", () => {
 
       // With admin permissions, rhdh-qe-2 should now see the instance
       const instanceLink = page.locator(`a[href*="${workflowInstanceId}"]`);
-      await expect(instanceLink).toBeVisible();
+      await expect(instanceLink).toBeVisible({ timeout: 20000 });
     });
 
     test("rhdh-qe-2 admin user can directly access rhdh-qe's workflow instance URL", async () => {