fix test_running_real_remove_backup_groups_job timeout (#2651)

## Changes
Increase timeout of inner task

### Linked issues
Resolves #2639 

### Functionality
None

### Tests
- [x] added integration tests

Co-authored-by: Eric Vergnaud <[email protected]>

Author: ericvergnaud

tests/integration/install/test_installation.py

@@ -187,7 +187,7 @@ def test_running_real_remove_backup_groups_job(ws: WorkspaceClient, installation
     # API internals have a 60s timeout. As such we should wait at least that long before concluding deletion has not
     # happened.
     # Note: If you are adjusting this, also look at: test_running_real_remove_backup_groups_job
-    @retried(on=[KeyError], timeout=timedelta(seconds=90))
+    @retried(on=[KeyError], timeout=timedelta(minutes=3))
     def get_group(group_id: str) -> NoReturn:
         _ = ws.groups.get(group_id)
         raise KeyError(f"Group is not deleted: {group_id}")