release-20.2: changefeedccl: remove unnecessary and/or impossible privilege checks #61661
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Backport 1/1 commits from #61031.
/cc @cockroachdb/release
Changefeeds were checking the SELECT privilege on every descriptor associated
with targeted tables, including the database (should not be required) and
custom types (not possible to assign granularly).
They now only check SELECT on the targeted tables itself.
Release note (bug fix): Better privilege checks when creating a changefeed
Closes #61006