[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.cpp

@@ -12,9 +12,7 @@
 #include "lua_object.h"
 #include "lua_door.h"
 
-#ifdef BOTS
 #include "lua_bot.h"
-#endif
 
 bool Lua_Entity::IsClient() {
 	Lua_Safe_Call_Bool();
@@ -122,22 +120,18 @@ Lua_Door Lua_Entity::CastToDoor() {
 	return Lua_Door(m);
 }
 
-#ifdef BOTS
 Lua_Bot Lua_Entity::CastToBot() {
 	void *d = GetLuaPtrData();
 	Bot *b = reinterpret_cast<Bot*>(d);
 	return Lua_Bot(b);
 }
-#endif
 
 luabind::scope lua_register_entity() {
 	return luabind::class_<Lua_Entity>("Entity")
 	.def(luabind::constructor<>())
 	.property("null", &Lua_Entity::Null)
 	.property("valid", &Lua_Entity::Valid)
-#ifdef BOTS
 	.def("CastToBot", &Lua_Entity::CastToBot)
-#endif
 	.def("CastToClient", &Lua_Entity::CastToClient)
 	.def("CastToCorpse", &Lua_Entity::CastToCorpse)
 	.def("CastToDoor", &Lua_Entity::CastToDoor)