[ci] Add more TVLA tests

[nasahlpa]

Currently, CI only runs a basic AES test for TVLA. We should extend CI to also test other features.
However, as I am not aware of which features are actually used and should be supported, could somebody (@vogelpi @vrozic @johannheyszl) please help me creating a list of testvectors we would like to have in CI? For example, as the --tttest-step-file feature (mentioned in #284 ) was not mentioned anywhere (documentation or getting started), I was not aware that this is something we would like to have.

I am happy to add all necessary TVLA features to CI and debug them if necessary.

[vogelpi]

Thanks for opening the issue @nasahlpa . What I would like to cover are the following features:

• Select 2 bytes in 2 rounds, e.g. Bytes 0 and 1 in Rounds 0 and 1. This will dramatically reduce the memory footprint and computation time. Note, we need a small change in the argument passing. Shouldn't be tricky though. Currently if selecting bytes and rounds, individual bytes and rounds are supported only. However this is not sufficient as we've just seen.
• Compute and memory could further be reduced by choosing fewer samples (not to be confused with fewer traces please).
• Plotting figures after computation.
• Recomputing the figures after loading ttest-step-file (this is currently broken).
• For now let's use the CW database for this. It's fine to switch once ceca.py is ported over to the new format.

I can work on this as well when I have some spare cycles.