release-21.1: sql: disallow table/view/sequence rename from making cross DB references #62341
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Backport 1/1 commits from #61741.
/cc @cockroachdb/release
Fixes: #55709
Previously, disallowed cross DB references could be created
using a ALTER TABLE/VIEW/SEQUENCE rename operations. This
was inadequate because users could accidentally start using
deprecated functionality. To address this, this patch detects
such scenarios are returns an appropriate error.
Release note (bug fix): ALTER TABLE/VIEW/SEQUENCE can no longer
be used to incorrectly create cross DB references.