pgsql: pgcrypto: Split off pgp-encrypt-md5 test

pgcrypto: Split off pgp-encrypt-md5 test

In FIPS mode, these tests will fail.  By having them in a separate
file, it would make it easier to have an alternative output file or
selectively disable these tests.  This isn't done here; this is just
some preparation.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/2766054.1700080156@sss.pgh.pa.us

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/3af0d17acef7538c5605afa5dd7929cfd7e38d9e

Modified Files
--------------
contrib/pgcrypto/Makefile                     |  2 +-
contrib/pgcrypto/expected/pgp-encrypt-md5.out | 11 +++++++++++
contrib/pgcrypto/expected/pgp-encrypt.out     |  8 --------
contrib/pgcrypto/meson.build                  |  1 +
contrib/pgcrypto/sql/pgp-encrypt-md5.sql      |  7 +++++++
contrib/pgcrypto/sql/pgp-encrypt.sql          |  3 ---
6 files changed, 20 insertions(+), 12 deletions(-)