[8] Move the DB group over to the tox gen script

[sentrivana]

• remove hardcoded entries for sqlalchemy, 'pymongo', 'redis_py_cluster_legacy', clickhouse_driver from the tox template
• remove them from the ignore list in populate_tox.py
• run populate_tox.py to fill in entries for them
• run split_gh_tox_actions.py to generate the CI yaml files so that they correspond to the new tox.ini

The remaining integrations in this group are not trivial to port to the script, I'll do this step by step in follow-up PRs.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.18%. Comparing base (b907e69) to head (290acfa).

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@                  Coverage Diff                   @@
##           ivana/tox-script-4    #3978      +/-   ##
======================================================
- Coverage               80.20%   80.18%   -0.02%     
======================================================
  Files                     139      139              
  Lines                   15394    15394              
  Branches                 2596     2596              
======================================================
- Hits                    12347    12344       -3     
- Misses                   2201     2204       +3     
  Partials                  846      846              

see 2 files with indirect coverage changes