Enumerates the type of topology that makes up a UtilityTier definition.
UtilityTierTopologyType can be one of:
|UtilityTierTopologyType::Radial (1)||A radial network. Edges and junctions spread out radially from a single source.|
|UtilityTierTopologyType::Mesh (2)||A mesh network. Edges and junctions are connected to multiple sources in an interconnected lattice.|