[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>

.drone.yml

@@ -19,7 +19,7 @@ steps:
     commands:
       - sudo chown eqemu:eqemu /drone/src/ * -R
       - sudo chown eqemu:eqemu /home/eqemu/.ccache/ * -R
-      - git submodule init && git submodule update && mkdir -p build && cd build && cmake -DEQEMU_BUILD_TESTS=ON -DEQEMU_BUILD_LOGIN=ON -DEQEMU_ENABLE_BOTS=ON -DEQEMU_BUILD_LUA=ON -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_FLAGS_RELWITHDEBINFO:STRING="-O0 -g -DNDEBUG" -G 'Unix Makefiles' .. && make -j$((`nproc`-4))
+      - git submodule init && git submodule update && mkdir -p build && cd build && cmake -DEQEMU_BUILD_TESTS=ON -DEQEMU_BUILD_LOGIN=ON -DEQEMU_BUILD_LUA=ON -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_FLAGS_RELWITHDEBINFO:STRING="-O0 -g -DNDEBUG" -G 'Unix Makefiles' .. && make -j$((`nproc`-4))
       - curl https://raw.githubusercontent.com/Akkadius/eqemu-install-v2/master/eqemu_config.json --output eqemu_config.json
       - ./bin/tests
     volumes: