Drop support for python 3.8

[MichaelFu512]

Pull Request Description

Featuretools and woodwork (and whole lot of other libraries) are dropping support for python 3.8, which will (and is) causing a lot of test run errors.

Closes #4416

---

After creating the pull request: in order to pass the release_notes_updated check you will need to update the "Future Release" section of docs/source/release_notes.rst to include this pull request by adding :pr:123.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.7%. Comparing base (7bd6ed6) to head (3def0d4).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #4414 +/- ## ======================================= + Coverage 99.7% 99.7% +0.1% ======================================= Files 357 357 Lines 39965 39973 +8 ======================================= + Hits 39840 39849 +9 + Misses 125 124 -1 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[MichaelFu512]

From #4314, here's the list of ones mentioned that are / have been unpinned and don't seem to cause any issues:

• networkx (unpinned in this MR)
• scikit-learn (unpinned in this MR, had to rework a test in test_partial_dependence.py)
• numpy
• dask
• distributed
• matplotlib
• featuretools
• woodwork

Here's the list of ones that cause issues (test failures):

• pandas
• scipy
• shap

Also, vowpalwabbit according to their documentation (https://github.com/VowpalWabbit/vowpal_wabbit/wiki/Python#support) doesn't support python 3.11 (you'd have to use vowpal-wabbit-next)