pgsql: Adjust contrib/sepgsql regression test expected outputs.

Adjust contrib/sepgsql regression test expected outputs.

Per buildfarm, the log output has changed as a consequence of
commit e056c557a changing the catalog accesses performed in
some commands.

Discussion: https://postgr.es/m/20230407211950.aojbdirwdrxjeyzb@awork3.anarazel.de

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/76c111a7f16659f9018391f655764c8226461ca4

Modified Files
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contrib/sepgsql/expected/alter.out | 12 ------------
contrib/sepgsql/expected/ddl.out   |  2 ++
2 files changed, 2 insertions(+), 12 deletions(-)