Draft: Add support for CLI arguments to TrigValSteering ART test framework

Implement features requested in ATR-24229

Draft for now. To do:

• test thoroughly in all combinations
• add unit test for CLI parsing
• integrate the new parsing with the custom TrigInDetValidation parsing on top in a way that doesn't break any TIDV feature
• add more arguments if requested
• update TrigValSteering README
• document in Trigger Developer Guide
• add option --input-info to list all possible inputs from TrigValInputs.json