Fix unstable tests in partition_merge.sql and partition_split.sql.

Fujii Masao <fujii@postgresql.org>

Commit: 4e5d6c40914e2b890c4780d33de8ad07b1d79689
Author: Fujii Masao <fujii@postgresql.org>
Date: 2024-07-15T05:11:13Z
Releases: 18.0
Fix unstable tests in partition_merge.sql and partition_split.sql.

The tests added by commit c086896625 were unstable due to
missing schema names when checking pg_tables and pg_indexes.

Backpatch to v17.

Reported by buildfarm.

Files