Convert deprecation warnings to errors

[JessicaS11]

icepyx has a series of deprecations that are still warnings. Some are new deprecations during the modifications for cloud reading, and some are stale but were never turned into errors prior to planned removal. This PR aims to turn all current deprecations into errors for the v1 release, with planned removal of the errors in a future minor release.

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[JessicaS11]

@rwegener2 This is basically ready for review, but I figured we'd want to merge #468 first since that's got some code changes in the same areas and there could be merge conflicts.

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[JessicaS11]

@rwegener2 This is all set for review!

[rwegener2]

Looks good to me! I'm loving all that code in the Read init that can be eliminated. I had a few suggestions, but I had to commit them directly since Github doesn't let you suggest on un-modified code. I tried to make small descriptive commits so you can see what is changing but overall it was just small updates to deprecated docstrings and condensing the deprecation errors.
Nice PR! 🎉

[JessicaS11]

I'm loving all that code in the Read init that can be eliminated.

Me too! Thanks for the edits.