AthenaPoolCnvSvc: Add T_AuxContainerCopyTPCnv.
Many of the versioning converters that operate on aux containers do nothing other than copy the container with SG::copyAuxStoreThinned. Add a template class to factor out the common code for this case.
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Many of the versioning converters that operate on aux containers do nothing other than copy the container with SG::copyAuxStoreThinned. Add a template class to factor out the common code for this case.