Revert "Merge branch 'LArHitContainerCnv_p2_useDataPool' into '23.0'"

Christos Anastopoulosrequested to merge
revert-f38c080f into 23.0

This reverts merge request !62203 (merged)

@jchapman lets revert this until we get to the bottom of the HitToRDO mem increase in 1st event

ping also @ssnyder

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