refactor: remove `Promise.await` calls from irc bridge (#28406)

apps/meteor/app/irc/server/irc-bridge/index.js

...r/app/irc/server/irc-bridge/localHandlers/onCreateRoom.js

...r/app/irc/server/irc-bridge/localHandlers/onCreateUser.js

...eor/app/irc/server/irc-bridge/localHandlers/onJoinRoom.js

...or/app/irc/server/irc-bridge/localHandlers/onLeaveRoom.js

...meteor/app/irc/server/irc-bridge/localHandlers/onLogin.js

...eteor/app/irc/server/irc-bridge/localHandlers/onLogout.js

.../app/irc/server/irc-bridge/localHandlers/onSaveMessage.js

...or/app/irc/server/irc-bridge/peerHandlers/disconnected.js

...r/app/irc/server/irc-bridge/peerHandlers/joinedChannel.js

...eor/app/irc/server/irc-bridge/peerHandlers/leftChannel.js

...eor/app/irc/server/irc-bridge/peerHandlers/nickChanged.js

...eor/app/irc/server/irc-bridge/peerHandlers/sentMessage.js

apps/meteor/app/irc/server/irc.js