[python] - issue #1172 - provide switching versions using update-alternatives#1260

ddoyle2017 merged 12 commits intodevcontainers:maindevcontainers/features:mainfrom

gauravsaini04:feature_addition_update-alternatives_manage_python_versionsgauravsaini04/features:feature_addition_update-alternatives_manage_python_versionsCopy head branch name to clipboard