[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/zonedb.h

@@ -12,9 +12,7 @@
 #include "event_codes.h"
 #include "../common/repositories/doors_repository.h"
 
-#ifdef BOTS
 #include "bot_database.h"
-#endif
 
 #define WOLF 42
 
@@ -633,10 +631,8 @@ public:
 	/* Things which really dont belong here... */
 	int16	CommandRequirement(const char* commandname);
 
-#ifdef BOTS
 	// bot database add-on to eliminate the need for a second database connection
 	BotDatabase botdb;
-#endif
 
 protected:
 	void ZDBInitVars();