python 3.8 support

Author: hephaex

commons/Dockerfile.base.py38-cuda11.3

@@ -199,9 +199,7 @@ RUN if [[ "${PYTHON_VERSION}" == "3.8" ]]; then \
         apt-get install -y python${PYTHON_VERSION}-distutils python-apt ; \
     fi
 
-RUN rm /usr/bin/python /usr/bin/python3 && \
-    ln -s /usr/bin/python3.8 /usr/bin/python3 && \
-    update-alternatives --install /usr/bin/python python /usr/bin/python3 1 && \
+RUN update-alternatives --install /usr/bin/python python /usr/bin/python3 1 && \
     update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.8 2
 
 WORKDIR /tmp