[Titles] Cleanup titles, title suffix, and last name methods. (#2174)

* [Titles] Cleanup titles, title suffix, and last name methods.
- Use strings instead of const chars*.
- Add optional parameter to SetAATitle in Lua so you can save to the database similar to Perl.
- Cleanup #lastname command.
- Cleanup #title command.
- Cleanup #titlesuffix command.

* Update npc.cpp

zone/gm_commands/lastname.cpp

@@ -15,7 +15,7 @@ void command_lastname(Client *c, const Seperator *sep)
 		return;
 	}
 	
-	target->ChangeLastName(last_name.c_str());
+	target->ChangeLastName(last_name);
 	c->Message(
 		Chat::White,
 		fmt::format(