[Bots] Cleanup and remove preprocessors. (#2757)

* [Bots] Cleanup and remove preprocessors.

- Removes every `#ifdef BOTS` we have and locks bots behind `Bots:AllowBots` rule.
- Bot updates are now done by default similar to regular database updates.
- Modify `CMakeLists.txt`, `.drone.yml`, and `BUILD.md` to match the removal of `EQEMU_ENABLE_BOTS`.

* Cleanup

- Add SQL for enabling bots for servers with bots.
- Add message that tells players/operators bots are disabled.

* Suggested changes.

* Bot injection stuff

* Change SQL to bot SQL.

* Tweaks

* Remove `is_bot`

* Update version.h

* Update main.cpp

* Update database.cpp

* Fix name availability crash

* Remove bots from update script

Co-authored-by: Akkadius <akkadius1@gmail.com>

zone/lua_entity_list.h

@@ -7,9 +7,7 @@
 class EntityList;
 class Lua_Mob;
 class Lua_Client;
-#ifdef BOTS
 class Lua_Bot;
-#endif
 class Lua_NPC;
 class Lua_Door;
 class Lua_Corpse;
@@ -19,9 +17,7 @@ class Lua_Raid;
 class Lua_Spawn;
 struct Lua_Mob_List;
 struct Lua_Client_List;
-#ifdef BOTS
 struct Lua_Bot_List;
-#endif
 struct Lua_NPC_List;
 struct Lua_Corpse_List;
 struct Lua_Object_List;
@@ -40,10 +36,7 @@ luabind::scope lua_register_corpse_list();
 luabind::scope lua_register_object_list();
 luabind::scope lua_register_door_list();
 luabind::scope lua_register_spawn_list();
-
-#ifdef BOTS
 luabind::scope lua_register_bot_list();
-#endif
 
 class Lua_EntityList : public Lua_Ptr<EntityList>
 {
@@ -130,7 +123,6 @@ public:
 	Lua_Spawn_List GetSpawnList();
 	void SignalAllClients(int signal_id);
 	void ChannelMessage(Lua_Mob from, int channel_num, int language, const char *message);
-#ifdef BOTS
 	Lua_Bot GetBotByID(uint32 bot_id);
 	Lua_Bot GetBotByName(std::string bot_name);
 	Lua_Client GetBotOwnerByBotEntityID(uint32 entity_id);
@@ -147,7 +139,6 @@ public:
 	void SignalAllBotsByOwnerName(std::string owner_name, int signal_id);
 	void SignalBotByBotID(uint32 bot_id, int signal_id);
 	void SignalBotByBotName(std::string bot_name, int signal_id);
-#endif
 };
 
 #endif