Use loguru for warnings reporting

[Zeitsperre]

Pull Request Checklist:

• [ ] This PR addresses an already opened issue (for bug fixes / features)
  • This PR fixes issue #xyz
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Documentation has been added / updated (for bug fixes / features)
• [x] HISTORY.rst has been updated (with summary of main changes)
• [x] I have added my relevant user information to AUTHORS.md

What kind of change does this PR introduce?:

• Updates the way that warnings are caught in pytest to use loguru consistently.

Does this PR introduce a breaking change?:

Somewhat. loguru should always be used for warnings control everywhere, and this PR puts that into effect.

Other information:

Python3.12 support is still blocked due to https://github.com/pydata/xarray/issues/7794. Not sure if there's anything we can do about that.

[coveralls]

Pull Request Test Coverage Report for Build 8236301516

Details

• 13 of 21 (61.9%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall first build on pytest-package-updates at 72.412%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
clisops/core/subset.py	13	21	61.9%
<!--	Total:	13	21	61.9%	-->

Totals
Change from base Build 7933588746:	72.4%
Covered Lines:	1777
Relevant Lines:	2454

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💛 - Coveralls