Remove redundant privilege check from pg_sequences system view.
This commit adjusts pg_sequence_last_value() to return NULL instead
of ERROR-ing for sequences for which the current user lacks
privileges. This allows us to remove the call to
has_sequence_privilege() in the definition of the pg_sequences
system view.
Bumps catversion.
Suggested-by: Michael Paquier
Reviewed-by: Michael Paquier, Tom Lane
Discussion: https://postgr.es/m/
20240501005730.GA594666%40nathanxps13