changefeedccl: db-level feeds: fail the feed if the watched db is dropped/renamed#159198

log-head wants to merge 6 commits intocockroachdb:mastercockroachdb/cockroach:masterfrom

log-head:log-head/db-level-changefeed-dropped-dblog-head/cockroach:log-head/db-level-changefeed-dropped-dbCopy head branch name to clipboard