[TEMP] Enable to use SQLite3 in v1_23_change_oauth2_sub_username_to_user_id.py

[jirik]

Part of issue #940

• [ ] Tests
• [ ] Layman Test Client (including docker image at docker hub)
• [ ] Changelog
• [ ] Documentation

Optionally

• Add dependency to doc/dependencies.md
• Push docker image(s) to docker hub

[index-git]

We plan to close this PR at the end of February.