Add gurobi 11

Maybe to merge before the externals which would install only gurobi 11, I suppose

ci/setup_spack.sh

@@ -74,20 +74,14 @@ do
   done
 done
 
-echo "config:" > ${SPACK_SYSTEM_CONFIG_PATH}/config_stack.yaml
 if [ -d cp -r "${STACK_CONFIG_PATH}/templates" ${SPACK_SYSTEM_CONFIG_PATH} ]
 then
-   cp -r "${STACK_CONFIG_PATH}/templates" ${SPACK_SYSTEM_CONFIG_PATH}
-   cat <<EOF >> ${SPACK_SYSTEM_CONFIG_PATH}/config_stack.yaml
-  template_dirs:
-    - ${SPACK_SYSTEM_CONFIG_PATH}/templates
-EOF
+   cp -r "${STACK_CONFIG_PATH}/templates" ${STACK_LOCATION}/spack/share/spack
 fi
 
 if [ -d "${STACK_CONFIG_PATH}/licenses" ]
 then
-  cp -r "${STACK_CONFIG_PATH}/licenses" ${SPACK_SYSTEM_CONFIG_PATH}
-  echo "  license_dir: ${SPACK_SYSTEM_CONFIG_PATH}/licenses" >> ${SPACK_SYSTEM_CONFIG_PATH}/config_stack.yaml
+  cp -r "${STACK_CONFIG_PATH}/licenses/*" ${STACK_LOCATION}/spack/etc/spack
 fi