CI: Parameterize python version in test-installation

The python version used in the test-installation Dockerfile
was hardcoded and we ended up with a couple of similar
Dockerfiles for different python versions.
Ideally we should keep a single Dockerfile to use
different python versions.

Signed-off-by: Daniel Zullo <[email protected]>

Author: daniel-zullo-frequenz

…test-installation/python-3.11.Dockerfile …/containers/test-installation/Dockerfile.github/containers/test-installation/python-3.11.Dockerfile renamed to .github/containers/test-installation/Dockerfile .github/containers/test-installation/python-3.11.Dockerfile renamed to .github/containers/test-installation/Dockerfile

@@ -3,7 +3,9 @@
 # This Dockerfile is used to test the installation of the python package in
 # multiple platforms in the CI. It is not used to build the package itself.
 
-FROM --platform=${TARGETPLATFORM} python:3.11-slim
+ARG PYTHON_VERSION="3.11"
+
+FROM --platform=${TARGETPLATFORM} python:${PYTHON_VERSION}-slim
 
 RUN apt-get update -y && \
     apt-get install --no-install-recommends -y \

.github/containers/test-installation/python-3.12.Dockerfile

@@ -274,8 +274,10 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           context: .
-          file: .github/containers/test-installation/python-${{ matrix.python }}.Dockerfile
+          file: .github/containers/test-installation/Dockerfile
           platforms: linux/amd64,linux/arm64
+          build-args: |
+            PYTHON_VERSION=${{ matrix.python }}
           tags: localhost/test-installation
           push: false