pgsql: Backpatch OpenSSL 3.0.0 compatibility in tests

Backpatch OpenSSL 3.0.0 compatibility in tests

backport of commit f0d2c65f17 to releases 11 and 12

This means the SSL tests will fail on machines with extremely old
versions of OpenSSL, but we don't know of anything trying to run such
tests. The ability to build is not affected.

Discussion: https://postgr.es/m/73e646d3-8653-1a1c-0a39-739872b591b0@dunslane.net

Branch
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REL_12_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/6133a0f4c7c39c9490b5aef91efba76ce83c5a02
Author: Peter Eisentraut <peter@eisentraut.org>

Modified Files
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src/test/ssl/Makefile                |  2 +-
src/test/ssl/ssl/server-password.key | 52 ++++++++++++++++++------------------
2 files changed, 27 insertions(+), 27 deletions(-)