fix: Adds a null check for NetworkObjectReference => GameObject conversion [NCCBUG-172]#2158

ShadauxCat merged 8 commits intodevelopUnity-Technologies/com.unity.netcode.gameobjects:developfrom

fix/null_check_for_NetworkObjectReference_GameObject_conversionUnity-Technologies/com.unity.netcode.gameobjects:fix/null_check_for_NetworkObjectReference_GameObject_conversionCopy head branch name to clipboard