TrigValidation: fix broken ART tests
Hello,
This MR is fixing a few ART tests:
- one failure is caused by the 'asetup Athena,master,latest' which now points to a super old master nightly, this must be replaced with 'main' (ATR-28096)
- the other is a conditions error in a Run2 test due to a CA migration that requires access to an extra conditions folder, although that folder was not actually used in Run2 (ATR-28094), which is bypassed by a conditions override
- one test is renamed to reflect the fact that it includes a AOD->DAOD step
Cheers, Bertrand