Grid import using opm-common improvements (#11438)

* Update opm-common EGRID reader to support LGRs, NNCs, dual porosity, unit system info and time step filters
* Rearrange well reading code into separate class
* Update resdata library to not require an ecl_grid when reading well information. Only lgr names are needed, allows reused by opm_common reader

ApplicationLibCode/ProjectDataModel/RimEclipseResultCase.h

@@ -84,6 +84,7 @@ protected:
 private:
     void loadAndUpdateSourSimData();
     void ensureRftDataIsImported();
+    bool showTimeStepFilterGUI();
 
     cvf::ref<RifReaderInterface> createMockModel( QString modelName );
     void                         defineUiOrdering( QString uiConfigName, caf::PdmUiOrdering& uiOrdering ) override;