2024-09-26: merge of 24.0 into main
This sweep contains the following MRs:
- !74419 (merged) UPC chains update [ATR-29025] [ATR-30208] Trigger, TriggerMenu, changes-trigger-counts
- !74500 (merged) TGCTriggerCondSvc: use AthMessaging Trigger
- !74508 (merged) TrigT1NSW[SimTools]: remove usage of deprecated ISvcLocator APIs Trigger