CI: Activate custom docker image with ubuntu 23.10 and geant4 11.2

With this MR the CI of GeoModel is switching to a custom docker image that is built in this repo and contains at the moment ubuntu 23.10 and geant4 11.2 - Now in GeoModel we don't build 3 docker images, but just one the "full" image that builds all the tools on top of the base image provided.

CI/DockerfileFull

 # Setup the most basic image
-ARG BASEIMAGE=gitlab-registry.cern.ch/geomodeldev/geomodel:main-base
+ARG BASEIMAGE=gitlab-registry.cern.ch/geomodeldev/ubuntu-geant4-image:main-base
 FROM ${BASEIMAGE}
 
-
-### First install Geant4 as we want to have the full functionallity
-RUN git clone https://gitlab.cern.ch/geant4/geant4.git --branch 'v10.6.0' && \
-    mkdir build_geant4 && \
-    cd build_geant4 && \
-    cmake -DCMAKE_INSTALL_PREFIX=/usr/local/geant4 -DCMAKE_BUILD_TYPE=Release -DGEANT4_INSTALL_DATA=ON -DGEANT4_USE_GDML=ON -DGEANT4_BUILD_MULTITHREADED=ON ../geant4/ &&\
-    make -j3 > /dev/null && \
-    sudo make install > /dev/null && \
-    cd .. && \
-    rm -rf build_geant4 geant4 && \
-    echo "#!/bin/bash" > ~/setup_docker.sh && \
-    echo "cd /usr/local/geant4/bin" >> ~/setup_docker.sh && \
-    echo "source geant4.sh" >> ~/setup_docker.sh && \
-    echo "cd -" >> ~/setup_docker.sh && \
-    sudo mv ~/setup_docker.sh  /usr/local/geant4/setup_docker.sh && \
-    echo "source /usr/local/geant4/setup_docker.sh" >> ~/.bashrc
-
 ### Compile then geo model
 COPY . /workdir/GeoModel_src/ 
 RUN mkdir -p /workdir/build_geomodel/ && \