For geographic 3D CRSs, added base geocentricCRS code and geocentric to geographic 3D conversion code to SOURCE_GEOGCRS_CODE and PROJECTION_CONV_CODE fields respectively; for geographic 2D CRSs, added base geog3DCRS code and geographic 3D to geographic 2D conversion code to SOURCE_GEOGCRS_CODE and PROJECTION_CONV_CODE fields respectively.