cql_types_test: Don't rely on MIN/MAX values of NaiveDate

[Lorak-mmk]

This PR changes test_naive_date so that it doesn't rely on current values of NaiveDate::MIN. This is necessary because CI broke after update of chrono changed those values.

Fixes: #917

Pre-review checklist

• I have split my patch into logically separate commits.
• All commit messages clearly explain what they change and why.
• I added relevant tests for new features and bug fixes.
• All commits compile, pass static checks and pass test.
• PR description sums up the changes and reasons why they should be introduced.
• I have provided docstrings for the public items that I want to introduce.
• I have adjusted the documentation in ./docs/source/.
• I added appropriate Fixes: annotations to PR description.