release-21.1: sql: remove fake index and statistics collectors pg_catalog tables #61876
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Backport 1/1 commits from #61794.
/cc @cockroachdb/release
Release note (sql change): Remove pg_catalog tables that were mistakenly added,
notably all tables that end in _index that are not pg_catalog.pg_classes and all
statistics collector tables that are not pg_stat_activity.
Removing pg statistics collector tables since they are somewhat different from regular pg_catalog tables and it's unlikely for us to implement them. Accessing them will simply error.
pg_metadata_test.go
has not yet been updating to reflect that the _index tables should not actually be tables.Release justification: Low risk, removing unused/unimplemented vtables before they make it into prod.