[v9.x] stream: always reset awaitDrain when emitting data
Backport of #18516, only conflict being the added debug() line that is being borrowed from 1e0f3315
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Backport of #18516, only conflict being the added debug() line that is being borrowed from 1e0f3315