* Refactor interface to PdmObjectHandle and PdmFieldHandle
Return objects instead of passing in structures as parameters
* Add nodiscard to several functions
* Remove redundant this->
* Rename to ptrReferencedObjectsByType
This approach fixes an NNC visibility issue related to use of m_rimFault->faultGeometry()->connectionIndices() before any was assigned in RigMainGrid::distributeNNCsToFaults()