[DevOps]: Drop Python 3.9 support

[tomvothecoder]

Is your feature request related to a problem?

Python 3.9 will be end-of-life soon. This should also be done in parallel with E3SM Unified.

https://devguide.python.org/versions/

Describe the solution you'd like

• Remove Python 3.9 from build matrix
• Make Python >=3.10 the minimum version in dev.yml, ci.yml, and setup.py
• Update pyproject.toml and other config files to expect Python 3.10 as minimum
• Update conda-forge feedstock recipe Python min version

Describe alternatives you've considered

No response

Additional context

No response