fix: client and server disconnect warnings#3786

NoelStephensUnity merged 10 commits intodevelop-2.0.0Unity-Technologies/com.unity.netcode.gameobjects:develop-2.0.0from

fix/server-sending-disconnectmessage-to-selfUnity-Technologies/com.unity.netcode.gameobjects:fix/server-sending-disconnectmessage-to-selfCopy head branch name to clipboard