Implement remove_if in CaloClusters_v2

Carla Marin Benitorequested to merge
cmarinbe_Sim10Up8-SanityChecks into master

Implement remove_if method in CaloClusters_v2 to allow the removal of a subset of clusters fulfilling a specific condition, eg negative energy clusters.

Needed for Rec!2351 (merged)

Edited by Carla Marin Benito

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