Our docker tests are failing due to a change in the deadsnakes PPA:

Note: Python 3.10 (jammy), Python3.12 (noble) are not provided by deadsnakes as upstream ubuntu provides those packages.

https://spruce.mongodb.com/task/drivers_tools_tests_rhel_test_docker_fca0ac532b85a24d9ceae9478976733b40bfca30_25_09_30_15_04_26/logs?execution=1

After instigation, deadsnakes has dropped support for Ubuntu 20, so we need to bump to Ubuntu 22.

Also, we were not properly running the docker-3.6 test because we weren't passing the variables through, so we should make sure we're testing with rhel8 in that case.