Do pre-release housekeeping on catalog data.

Do pre-release housekeeping on catalog data.

Run renumber_oids.pl to move high-numbered OIDs down, as per pre-beta
tasks specified by RELEASE_CHANGES.  For reference, the command was
./renumber_oids.pl --first-mapped-oid=8000 --target-oid=5032

Also run reformat_dat_file.pl while I'm here.

Renumbering recently-added types changed some results in the opr_sanity
test.  To make those a bit easier to eyeball-verify, change the queries
to show regtype not just bare type OIDs.  (I think we didn't have
regtype when these queries were written.)