pgsql: pg_upgrade: Run test suite with initial OID higher than UINT32_M

pg_upgrade: Run test suite with initial OID higher than UINT32_MAX

The test already used a pg_resetwal to bump the initial OID to be higher
than UINT32_MAX after the main regression test suite has been run, to
check that pg_upgrade was able to carry an 8-byte wide value. This now
happens set much earlier in the script, before running the main
regression test suite.

A small oid8-related check is added, while on it. Perhaps this could be
expanded to more objects and/or patterns later on. It should be good
enough as a starting point.

Author: Michael Paquier <michael(at)paquier(dot)xyz>
Reviewed-by: Greg Burd <greg(at)burd(dot)me>
Reviewed-by: Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>
Discussion: https://postgr.es/m/aqd_gYs35v--sVlR@paquier.xyz

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/04c4c1c3a9636bb33875c039948795d7cd0da507

Modified Files
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src/bin/pg_upgrade/t/002_pg_upgrade.pl | 42 ++++++++++++++++++++++------------
1 file changed, 28 insertions(+), 14 deletions(-)