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_11_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/cab553a08e2d7ba8be52a1871977fa6653ba5924
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(-)