Support moto 5.0

[s-t-e-v-e-n-k]

moto 5.0 has been released, and the major change is to pull all of the mocking into one function. Use the new mock_aws function, but continue to support moto 4.2, since it's easy.

• Added tests for changed code.
• New or changed APIs are added to our typing examples to ensure our external type hints are sound.
• Updated documentation for changed code.
  • New functions/classes have to be added to docs/api.md by hand.
  • Changed/added classes/methods/functions have appropriate versionadded, versionchanged, or deprecated directives.
• Documentation in .md files are written using semantic newlines.
• Changes (and possible deprecations) are documented in the changelog.

[hynek]

Thank you very much! This isn't I would be capable or even motivated to figure out on myself. :)

I've added a few simplifications, lmk what you think.

[s-t-e-v-e-n-k]

@hynek All done, thanks for the review and the suggestions.

[hynek]

thanks!