Address a number of `DeprecationWarning`s that are issued when running tests

[pkhalaj]

• [X] Closes #2984
• [X] Tests added
• [X] Fully documented
• [X] Add your name to AUTHORS.md if not there already

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 96.07%. Comparing base (fd2cec6) to head (045331c). Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
satpy/writers/awips_tiled.py	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2986 +/- ## ========================================== - Coverage 96.10% 96.07% -0.03% ========================================== Files 377 377 Lines 55147 55148 +1 ========================================== - Hits 52997 52985 -12 - Misses 2150 2163 +13 ``` | [Flag](https://app.codecov.io/gh/pytroll/satpy/pull/2986/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pytroll) | Coverage Δ | | |---|---|---| | [behaviourtests](https://app.codecov.io/gh/pytroll/satpy/pull/2986/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pytroll) | `3.94% <0.00%> (-0.01%)` | :arrow_down: | | [unittests](https://app.codecov.io/gh/pytroll/satpy/pull/2986/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pytroll) | `96.17% <80.00%> (-0.03%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pytroll#carryforward-flags-in-the-pull-request-comment) to find out more.

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