Drop support for Python 3.8

[irtazaakram]

Description:

Follow and complete all of the following steps for the issue to be marked as done.

• Update the tox.ini, setup.py, setup.cfg, or pyproject.toml to remove Python 3.8 from the supported versions list.
• Ensure the GitHub Actions workflows are updated, particularly removing Python 3.8 from the CI matrix.
• Review and clean up any testing or build configurations referencing Python versions earlier than 3.11.
• Run tests in the CI to ensure everything passes after removing Python 3.8.
• Add a CHANGELOG entry: “Dropped support for Python 3.8.”
• Bump the package version and release a new version on GitHub & PyPI (if applicable).

[bmtcril]

I'm marking this as blocked for now, we need to support Py 3.8 until we do the breaking 2.0 release of Aspects (around Sumac launch) since 1.x supports back to Nutmeg.

[Ian2012]

@bmtcril this change would only affect the environment were the plugin is installed, right?

So this would require bumping the minimum tutor version required.

[bmtcril]

It's kind of complicated since we run code in so many environments:

• Our own Aspects container (should already be upgraded?)
• Superset (running 3.10, not sure if we're actually testing much of that code now, or what version we're using off hand)
• Whatever is running Tutor commands, for testing those yes I think we'd need to bump our Tutor version, which we should do for a breaking 2.0 change anyway