fix: Fixes warning logged on double-initialize of prefabs lists.#2565

NoelStephensUnity merged 3 commits intodevelopUnity-Technologies/com.unity.netcode.gameobjects:developfrom

fix/handle_prefab_double_initializeUnity-Technologies/com.unity.netcode.gameobjects:fix/handle_prefab_double_initializeCopy head branch name to clipboard