[CI] Don't forget to move all tests to Ubuntu 22.04 and 24.04 when removing 20.04 support

[dimakuv]

Description of the problem

PR #1843 adds support for Ubuntu 24.04 and also re-writes the Dockerfile for Ubuntu 22.04.

These two new Docker images have a minimal stripped-down list of installed dependencies. That's because they don't test all our CI test cases -- this happens currently on Ubuntu 20.04.

So in the follow-up PR that will remove Ubuntu 20.04 completely, we must remember to move all tests from 20.04 to the new pipelines. See also the discussion https://reviewable.io/reviews/gramineproject/gramine/1843#-NyLfUV50eMo7NBJzXBv

Gramine commit hash

PR #1843