refactor!: remove network dictionary & set, use native container in List, add tests#1149

mattwalsh-unity merged 21 commits intodevelopUnity-Technologies/com.unity.netcode.gameobjects:developfrom

refactor/simplify_collection_interfacesUnity-Technologies/com.unity.netcode.gameobjects:refactor/simplify_collection_interfacesCopy head branch name to clipboard