Merge branch 'f-quotes-around-datetimes' into 'dev'

Tests for quotes around datetimes

# Summary

Adds a test for checking queries with quoted datetimes. See [#39](https://gitlab.com/caosdb/caosdb-server/-/issues/39) in caosdb-server.

# Focus

`test_issue_39` in `tests/test_issues_server.py` 

# Test Environment

Use an empty profile with server set to `f-quotes-around-datetimes` manually in `profile.yml`.

# Check List for the Author

Please, prepare your MR for a review. Be sure to write a summary and a
focus and create gitlab comments for the reviewer. They should guide the
reviewer through the changes, explain your changes and also point out open
questions. For further good practices have a look at [our review
guidelines](https://gitlab.com/caosdb/caosdb/-/blob/dev/REVIEW_GUIDELINES.md)

- [x] All automated tests pass
- [x] Reference related Issues
- [x] Up-to-date CHANGELOG.md
- [x] Annotations in code (Gitlab comments)
  - Intent of new code
  - Problems with old code
  - Why this implementation?


# Check List for the Reviewer


- [x] I understand the intent of this MR
- [ ] All automated tests pass
- [x] Up-to-date CHANGELOG.md
- [ ] The test environment setup works and the intended behavior is
  reproducible in the test environment
- [ ] In-code documentation and comments are up-to-date.
- [ ] Check: Are there spezifications? Are they satisfied?

For further good practices have a look at [our review guidelines](https://gitlab.com/caosdb/caosdb/-/blob/dev/REVIEW_GUIDELINES.md).

See merge request caosdb/caosdb-pyinttest!32