Resolve "member zones are deleted if RRsig appears in the catalog zone"
When encountering an unexpected RRtype for a name during catalog zone processing, dns_catz_update_from_db() is breaking from the inner loop and isn't processing the other records in the RRset.
This issue has been fixed in main (and backported to v9.18) in !6012 (merged) by the 0b2d5490 commit, in the context of catalog zone update effort.
This MR cherry-picks only that commit from the mentioned MR.
Closes #3380 (closed)