ACTS ART test improvements

Apply changes tested in test_run4_acts_ckf_mu100GeV.sh to other test_run4_acts_*.sh tests.

• add technical efficiency plots for ckf (Athena ambi) chain.
• add DCube comparison between ACTS chain and fixed Athena reference.
• Exclude AOD*.root from art-output.
• Include last_results in art-output, so downloadable from DCube results.
• Add DCube labels: ckf vs ambi and acts vs athena.
• Include SiSPSeededTracksActsValidateTracksTracks collection and plots to see the CKF output without ambi. These are not (yet) shown in the DCube result.
• Add runIDPVM.py --doExpertPlots option everywhere.
• New DCube config file, dcube_IDPVMPlots_ACTS_CKF_ITk_detail.xml, comparing SiSPSeededTracksActsValidateTracksTracks and running all checks. This config file is not (yet) used by any of the tests.
• Fix some comments.

CC @pibutti, @cvarni

TODO in possible future MRs: check if tech eff can be enabled for ttbar+PU200, include SiSPSeededTracksActsValidateTracksTracks in DCube comparison, switch DCube test to KSnorm, do we want more tests (eg. χ²) enabled?