Only install requirements for testing

.github/workflows/build.yml

@@ -23,7 +23,6 @@ jobs:
         run: make basler ARGS="-ci"
       - name: Install packages via rosdep
         run: |
-          pip install -r requirements/dev.txt
           rosdep update
           sudo apt install -y libunwind-dev
           # Small hack to make rosdep install all dependencies at once
@@ -40,6 +39,7 @@ jobs:
         working-directory: /colcon_ws
       - name: Test packages
         run: |
+          pip install syrupy pytest-mock
           . /opt/ros/iron/setup.sh
           . /colcon_ws/install/setup.sh
           colcon test --packages-ignore pylon_ros2_camera_component