Fix CI to install Opencv

.gitlab/ci/_global.gitlab-ci.yml

@@ -21,4 +21,14 @@ default:
   image: nvidia/cuda:12.2.0-devel-ubuntu22.04
   before_script:
     - apt update
-    - apt install -y cmake cppcheck python-is-python3 pip git gcovr unzip curl
+    - apt install -y cmake cppcheck python-is-python3 pip git gcovr unzip curl wget g++
+    # Install OpenCV
+    # Download and unpack sources
+    - wget -O opencv.zip https://github.com/opencv/opencv/archive/4.x.zip
+    - unzip opencv.zip
+    # Create build directory
+    - mkdir -p build && cd build
+    # Configure
+    - cmake  ../opencv-4.x
+    # Build
+    - cmake --build .