fix(ban): Don't allow banning in one-to-one conversations and fix banning IP ranges#12943

nickvergessen merged 2 commits intomainnextcloud/spreed:mainfrom

bugfix/noid/dont-allow-banning-in-one-to-onenextcloud/spreed:bugfix/noid/dont-allow-banning-in-one-to-oneCopy head branch name to clipboard