Sweep previously ignored patch to 21.6 into master

Tag: @ewelina

I originally (!37564 (merged)) asked this commit patching 21.6 not to be swept into master. To get this functionality and that of !39376 (merged) in master as cleanly as possible we need this commit in master after all.

This merge request affects 1 package:

• Generators/EvgenProdTools

This merge request affects 1 file:

• Generators/EvgenProdTools/src/CountHepMC.cxx

added Generators master review-pending-level-1 labels

mentioned in merge request !39376 (merged)

CI Result SUCCESS (hash ecc828f5)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 2
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 25643]

It is a sweep and the warnings are unrelated, approving. Pienpen (L1)

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 1f653bc7

added sweep:ignore label