[9.20] chg: test: Improve crypto support detection and algorithm selection in pytest

Ensure that the selected algorithms remains stable throughout the entire test session. Crypto support detection was rewritten to python and simplified.

Closes #4202

Closes #4422

Related #3810

Backport of MR !8803

Merge branch 'backport-4202-algorithm-detection-pytest-9.20' into 'bind-9.20'

See merge request isc-projects/bind9!9201