[9.16][CVE-2022-3736] Test RRSIG queries with serve-stale enabled
Backport of !7578 (merged)
Originally https://gitlab.isc.org/isc-private/bind9/-/merge_requests/484
See #3622 (closed)
Backport of !7578 (merged)
Originally https://gitlab.isc.org/isc-private/bind9/-/merge_requests/484
See #3622 (closed)