fix(test): timeout is causing intermittent failures (#9341)

<!-- Clearly explain the need for these changes: -->
Tests keep failing
### Changes 🏗️

<!-- Concisely describe all of the changes made in this pull request:
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- changes a 20 to 30

autogpt_platform/backend/backend/util/test.py

@@ -57,7 +57,7 @@ async def wait_execution(
     user_id: str,
     graph_id: str,
     graph_exec_id: str,
-    timeout: int = 20,
+    timeout: int = 30,
 ) -> Sequence[ExecutionResult]:
     async def is_execution_completed():
         status = await AgentServer().test_get_graph_run_status(graph_exec_id, user_id)