Pin pint below v0.24

[Zeitsperre]

Pull Request Checklist:

• This PR addresses an already opened issue (for bug fixes / features)
  • This PR references New pint version (0.24) breaks units #1771
• Tests for the changes have been added (for bug fixes / features)
  • (If applicable) Documentation has been added / updated (for bug fixes / features)
• CHANGES.rst has been updated (with summary of main changes)
  • Link to issue (:issue:number) and pull request (:pull:number) has been added

What kind of change does this PR introduce?

• Pinned pint below v0.24 until we have time to adapt to their new API.
• Updated the dependency-review action

Does this PR introduce a breaking change?

Yes, pint is now pinned and astroid has been removed from the environment.yml (was unused).

Other information:

https://pint.readthedocs.io/en/stable/changes.html

[Zeitsperre]

@Ouranosinc/xclim-core

The issues with pint will affect all new installations. We should be releasing a patch version as soon as we reasonably can.

[coveralls]

coverage: 90.598%. first build
when pulling 1613f8f on pin-pint
into 1f40f13 on main.