pgsql: Add regression expected-files for older OpenSSL in FIPS mode.

Add regression expected-files for older OpenSSL in FIPS mode.

In our previous discussions around making our regression tests
pass in FIPS mode, we concluded that we didn't need to support
the different error message wording observed with pre-3.0 OpenSSL.
However there are still a few LTS distributions soldiering along
with such versions, and now we have some in the buildfarm.
So let's add the variant expected-files needed to make them happy.

This commit only covers the core regression tests. Previous
discussion suggested that we might need some adjustments in
contrib as well, but it's not totally clear to me what those
would be. Rather than work it out from first principles,
I'll wait to see what the buildfarm shows.

Back-patch to v17 which is the oldest branch that claims
to support this case.

Author: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Discussion: https://postgr.es/m/443709.1757876535@sss.pgh.pa.us
Backpatch-through: 17

Branch
------
REL_17_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/a865b654c7735008092511d7c170b48b8bfa6419

Modified Files
--------------
src/test/regress/expected/md5_2.out | 35 +++++++
src/test/regress/expected/password_2.out | 152 +++++++++++++++++++++++++++++++
2 files changed, 187 insertions(+)