Install qt6 with brew instead of conda

With conda, during ccmake of geant4, I have to set QT_HOST_PATH and QT_HOST_PATH_CMAKE_DIR. Even with that I still have problem due to a cross-compile of qt6

.cirrus.yml

@@ -78,13 +78,13 @@ build_wheel_task:
     - ls
     - cd core
     - mkdir opengate_core/plugins
-    - cp -r $HOME/miniconda3/lib/qt6/plugins/platforms/* opengate_core/plugins/
-    - cp -r $HOME/miniconda3/lib/qt6/plugins/imageformats opengate_core/plugins/
-    - ls $HOME/miniconda3/lib/
+    - cp -r /opt/homebrew/share/qt/plugins/platforms/* opengate_core/plugins/
+    - cp -r /opt/homebrew/share/qt/plugins/imageformats/* opengate_core/plugins/
+    - ls /opt/homebrew/lib
     - rm -rf dist
     - python3 setup.py sdist bdist_wheel
     - ls dist
-    - export DYLD_LIBRARY_PATH=$HOME/software/geant4/bin/BuildProducts/lib:/Users/runner/miniconda3/envs/opengate_core/lib/qt6/plugins/platforms:/opt/X11/lib/:$DYLD_LIBRARY_PATH:/Users/runner/miniconda3/envs/opengate_core/lib
+    - export DYLD_LIBRARY_PATH=$HOME/software/geant4/bin/BuildProducts/lib:/opt/homebrew/share/qt/plugins/platforms/:/opt/X11/lib/:$DYLD_LIBRARY_PATH:/opt/homebrew/lib
     - delocate-listdeps --all dist/*.whl
     - delocate-wheel -w fixed_wheels -v dist/*.whl
     - rm -rf dist