[GitHub][docker] Add python3 venv package to CI container

Author: vbvictor

.github/workflows/containers/github-action-ci/Dockerfile

@@ -62,6 +62,7 @@ RUN apt-get update && \
     # Having a symlink from python to python3 enables code sharing between
     # the Linux and Windows pipelines.
     python3-pip \
+    python3-venv \
     file \
     tzdata \
     python-is-python3 && \