Bump: min pipeline python version bump

Change Summary

Min python version used in pipeline was bumped to 3.8

[x] My code has been rebased from devel before I start
[x] I have read the CONTRIBUTING document.
[x] My change requires a change to the documentation and documentation have been updated accordingly. (check the box if not applicable)
[ ] I have updated molecule CI testing accordingly. (check the box if not applicable)