[v10.x] backport HTTP/2 security release fixups
Backports of #29399 and #29459.
These solve issues introduced in #29122. There were no conflicts, this is just to make sure it happens, ideally in the next release.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Backports of #29399 and #29459.
These solve issues introduced in #29122. There were no conflicts, this is just to make sure it happens, ideally in the next release.