Move from python:3.10-slim to python:3.10-alpine default base image

[lhstrh]

python:3.10-slim derives from Debian bookworm and the C image derives from Alpine. Debian will use bash as its shell, alpine will use POSIX Dash. However I'm surprised this would make a difference on something like quoting where the two shells should be interchangeable.

I think it would be a good idea to have the Python docker images use the same parent image as our C image, so that they have the same shell and package manager. python:3.10-alpine is an official image for Python 3.10 that is based on Alpine, so this would accomplish this.

Originally posted by @elgeeko1 in #2377 (comment)