Add rolling upgrade tests for table oids assigned on 6.3

[jeeminso]

Summary of the changes / Why this is an improvement

Checklist

• Link to issue this PR refers to (if applicable): Fixes #???

[jeeminso]

======================================================================
FAIL: test_rolling_upgrade_5_to_6 (test_rolling_upgrade.RollingUpgradeTest.test_rolling_upgrade_5_to_6) [6.2 -> 6.3.x]
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Traceback (most recent call last):
  File "/var/lib/jenkins/workspace/CrateDB/qa/crate_qa_on_pr/tests/bwc/test_rolling_upgrade.py", line 40, in test_rolling_upgrade_5_to_6
    self._test_rolling_upgrade(path, nodes=3)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/var/lib/jenkins/workspace/CrateDB/qa/crate_qa_on_pr/tests/bwc/test_rolling_upgrade.py", line 106, in _test_rolling_upgrade
    self.assertEqual(
    ~~~~~~~~~~~~~~~~^
        zero_oids,
        ^^^^^^^^^^
        [],
        ^^^
        f"pg_class contains oid = 0 for relations: {zero_oids}"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: Lists differ: ['rx', 'x', 'y', 'parted', 't1', 't2', 't3'] != []

First list contains 7 additional elements.
First extra element 0:
'rx'

- ['rx', 'x', 'y', 'parted', 't1', 't2', 't3']
+ [] : pg_class contains oid = 0 for relations: ['rx', 'x', 'y', 'parted', 't1', 't2', 't3']

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Ran 1 test in 88.806s

currently all table oids are 0.