Using https://launchpad.net/~deadsnakes/+archive/ubuntu/ppa

for example: tox -e docker-ubuntu-bionic-standard-deadsnakes-gcc_8-python3.10

We also fix ubuntu-bionic-gcc_8-minimal and similar, which currently fail (https://github.com/sagemath/sage/actions/runs/3355189859/jobs/5579332788) because python3.8-distutils is missing

Depends on #34665
Depends on #34081

CC: @orlitzky @dimpase

Component: porting

Author: Matthias Koeppe

Branch/Commit: 8c45492

Reviewer: Dima Pasechnik

Issue created by migration from https://trac.sagemath.org/ticket/30217