Trigger ART: remove --CA from test definitions
Cherry-pick of the following trigger ART MRs from main:
- !71060 (merged): TrigGpuTest+TriggerTest: remove redundant --CA from athena command line
- !71104 (merged): TrigValSteering: fix preExec for transforms
- !71057 (merged): TrigValSteering: remove support for legacy job options