[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>

CMakeLists.txt

@@ -122,7 +122,6 @@ ENDIF()
 MESSAGE(STATUS "**************************************************")
 
 #options
-OPTION(EQEMU_ENABLE_BOTS "Enable Bots" OFF)
 OPTION(EQEMU_COMMANDS_LOGGING "Enable GM Command logs" ON)
 OPTION(EQEMU_BUILD_SERVER "Build the game server." ON)
 OPTION(EQEMU_BUILD_LOGIN "Build the login server." ON)
@@ -176,10 +175,6 @@ IF(EQEMU_COMMANDS_LOGGING)
 	ADD_DEFINITIONS(-DCOMMANDS_LOGGING)
 ENDIF(EQEMU_COMMANDS_LOGGING)
 
-IF(EQEMU_ENABLE_BOTS)
-	ADD_DEFINITIONS(-DBOTS)
-ENDIF(EQEMU_ENABLE_BOTS)
-
 #database
 IF(MySQL_FOUND AND MariaDB_FOUND)
 	SET(DATABASE_LIBRARY_SELECTION MariaDB CACHE STRING "Database library to use: