Sweeping !20849 from 21.3 to 21.9. ATR-19309: Code changes in b-jet chain defs for supporting HH4b trigger chains

Atlas Nightlybuildrequested to merge
cherry-pick-ffdf234adc-21.9 into 21.9

ATR-19309: Code changes in b-jet chain defs for supporting HH4b trigger chains

See merge request !20849 (merged)

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