Drop Python 3.10 (EOL)

[jnoordsij]

Per https://blog.python.org/2026/10/python-31022-31117

Python 3.10.22 is the final release of Python 3.10. After five years, the series has reached end of life and will receive no further security updates. If you are still using Python 3.10, please plan your upgrade to a supported version.

(As such, this should only be merged after builds for 3.10.22 are done).

[yosifkit]

Thanks @jnoordsij!

We'll merge after docker-library/official-images#22403.