Migrate McEventCollectionFilter to HepMC3

Trivial changes to migrate McEventCollectionFilter to HEpMC3

This merge request affects 1 package:

• Simulation/Tools/McEventCollectionFilter

Adding @jchapman ,@vpascuzz as watchers

added Simulation master review-pending-level-1 labels

CI Result SUCCESS (hash 2d9943e0)

	Athena	AthSimulation	AthGeneration	AnalysisBase
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
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 21127]

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

mentioned in commit 601fe4fa

merged

added sweep:ignore label