Sweeping !54674 from master to 22.0. MuonG4SD: const fixes and enable thread-checker

Atlas Nightlybuildrequested to merge
cherry-pick-9bc61d104b0-22.0 into 22.0

MuonG4SD: const fixes and enable thread-checker

See merge request !54674 (merged)

Edited by Frank Winklmeier

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