pgsql: Suppress DETAIL output from a foreign_data test.

Suppress DETAIL output from a foreign_data test.

Unstable sort order related to changes to nbtree from commit dd299df8
can cause two lines of DETAIL output to be in opposite-of-expected
order. Suppress the output using the same VERBOSITY hack that is used
elsewhere in the foreign_data tests.

Note that the same foreign_data.out DETAIL output was mechanically
updated by commit dd299df8. Only a few such changes were required,
though.

Per buildfarm member batfish.

Discussion: https://postgr.es/m/CAH2-WzkCQ_MtKeOpzozj7QhhgP1unXsK8o9DMAFvDqQFEPpkYQ@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/7d3bf73ac416fdd74d6c7d473e0c00a19be90c82

Modified Files
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src/test/regress/expected/foreign_data.out | 6 +++---
src/test/regress/sql/foreign_data.sql | 4 +++-
2 files changed, 6 insertions(+), 4 deletions(-)