test: add missing await in fs-rm/fs-rmdir tests
Noticed that a few assertions were not being awaited, this could potentially be leading to flakiness in tmp cleanup.
Refs: #41201 (closed)
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Noticed that a few assertions were not being awaited, this could potentially be leading to flakiness in tmp cleanup.
Refs: #41201 (closed)