Update and Sync Mutelist with upstream alchemy

Satisfies the feature request for mute toggle to display mute status
Adds dynamic mute/unmute option to P2P IM dropdown.

Translators should look into the changes made in this commit for:
floater_chat_history.xml, floater_instant_message.xml, floater_instant_message_concisebuttons.xml
panel_avatar.xml has been taken care of for spanish and french, although they should be looked into more closely by the translators.

Cleanup and Sync in related places~
Removal of old static callbacks.
Moves God Names logic into LFSimFeatureHandler
Adds a custom function LLMuteList::hasMute() for quickly checking if a mute is in the internal set.

indra/llmessage/aihttptimeoutpolicy.cpp

@@ -952,10 +952,8 @@ P(regionResponder);
 P(remoteParcelRequestResponder);
 P(requestAgentUpdateAppearance);
 P(responderIgnore);
-P(sessionInviteResponder);
 P(setDisplayNameResponder);
 P2(simulatorFeaturesReceived,					transfer_22s_connect_10s);
-P(startConferenceChatResponder);
 P2(startGroupVoteResponder,						transfer_300s);
 P(translationReceiver);
 P(uploadModelPremissionsResponder);