2024-03-06: merge of 24.0 into main

This sweep contains the following MRs:

• !69464 (merged) Asynchronous I/O in HltEventLoopMgr: copy to new class Trigger
• !69515 (merged) Reorganize L1Calo Monitoring Core, DQ, JetEtmiss, L1Calo, Trigger
• !69554 (merged) Updated default Hot-RoI mask LUTs to v2 for L1MuonEndcap Trigger
• !69454 (merged) post_tpcnvtest.sh: Drop suppression of warnings about failed import of DigitizationFlags Calorimeter, Core, Database, Trigger
• !69511 (merged) TrigT1CaloByteStream: delete legacy job options DQ, L1Calo, Trigger
• !69491 (merged) athena.py: remove imports of RecFlags and BeamFlags Core
• !69540 (merged) Delete legacy MuonTrackMonitoring configs DQ, MuonSpectrometer
• !69547 (merged) SubDetectorEnvelopes: delete legacy job options Geometry, Simulation
• !69563 (merged) Fix for error "No TOBs found passing the threshold NSWMon" (ATR-28915) Trigger
• !69527 (merged) Add new Xbb chains and modify the existing ones to have phase1 L1 seed along with preselection Trigger, TriggerMenu, changes-trigger-counts
• !69452 (merged) Adding Scan WP chains to dev Trigger, TriggerMenu, changes-trigger-counts
• !69524 (merged) ATR-28893, Update BCM items Trigger, TriggerMenu
• !69468 (merged) ATR-28412 VBF+Displaced chains for DPJ searches JetEtmiss, Trigger, TriggerJet, TriggerMenu, changes-trigger-counts
• !69526 (merged) ATR-28844 - Updates in MonitorDef Trigger, TriggerMenu
• !69530 (merged) ATR-28916 - Final clean up of Legacy EM Trigger, TriggerMenu, changes-trigger-counts