add support for Python 3.11

[gruebel]

Pull Request Checklist

Thank you for taking the time to improve Arrow! Before submitting your pull request, please check all appropriate boxes:

• [ ] 🧪 Added tests for changed code.
• [x] 🛠️ All tests pass when run locally (run tox or make test to find out!).
• [x] 🧹 All linting checks pass when run locally (run tox -e lint or make lint to find out!).
• [ ] 📚 Updated documentation for changed code.
• [x] ⏩ Code is up-to-date with the master branch.

If you have any questions about your code changes or any of the points above, please submit your questions along with the pull request and we will try our best to help!

Description of Changes

Happy to get the chance to finally contribute something to this great project 🎉

• Added support of Python 3.11. Was pretty easy, no deprecation warnings popped up, at least I didn't see them 😄
• Added the Python 3.11 classifier

When Python 3.11 will be finally released, then the dev suffix for GHA should be removed.

[codecov[bot]]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage :thumbsup:

Coverage data is based on head (48520e7) compared to base (f8f3068). Patch has no changes to coverable lines.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1126 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 10 9 -1 Lines 2325 2318 -7 Branches 449 492 +43 ========================================= - Hits 2325 2318 -7 ``` | [Impacted Files](https://codecov.io/gh/arrow-py/arrow/pull/1126?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=arrow-py) | Coverage Δ | | |---|---|---| | [arrow/\_\_init\_\_.py](https://codecov.io/gh/arrow-py/arrow/pull/1126/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=arrow-py#diff-YXJyb3cvX19pbml0X18ucHk=) | | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=arrow-py). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=arrow-py)

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[gruebel]

sorry, had to adjust the name of the version otherwise the tox-gh-actions plugin doesn't recognize it