fix: Block websocket use in dedicated server builds#3336

EmandM merged 3 commits intodevelop-2.0.0Unity-Technologies/com.unity.netcode.gameobjects:develop-2.0.0from

fix/mtt-11522-websockets-dont-exist-on-server-buildUnity-Technologies/com.unity.netcode.gameobjects:fix/mtt-11522-websockets-dont-exist-on-server-buildCopy head branch name to clipboard