[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/bot_command.cpp

@@ -32,8 +32,6 @@
 
 */
 
-#ifdef BOTS
-
 #include <string.h>
 #include <stdlib.h>
 #include <sstream>
@@ -10824,5 +10822,3 @@ void bot_command_enforce_spell_list(Client* c, const Seperator *sep)
 		).c_str()
 	);
 }
-
-#endif // BOTS