barcode -> ID migration for HGTD/InDet/MuonDigitization.

John Derek Chapmanrequested to merge
jchapman/athena:DigitizationToID_main into main

Migrate HGTD_Digitization, InDetDigitization and MuonDigitization code to use GenParticle::id rather than barcodes internally. (Should not change Digitization output.)

See ATLASSIM-6978

Edited by John Derek Chapman

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