TruthUtils: Testing isWeaklyDecayingBHadron and isWeaklyDecayingCHadron

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

Add isWeaklyDecayingBHadron and isWeaklyDecayingCHadron helper functions to unit test and helper executables. Update unit test reference file correspondingly.

Edited by John Derek Chapman

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