Fix check typing
This PR:
- Fix most of the type check errors,
- Fix missing return in
enos_g5k/driver.py, - Fix a double import error in
infra/enos_vmong5k/provider.py
GitLab upgrade completed. Current version is 18.5.4
https://about.gitlab.com/releases/2025/09/18/gitlab-18-4-released/
https://about.gitlab.com/releases/2025/10/16/gitlab-18-5-released/
This PR:
enos_g5k/driver.py,infra/enos_vmong5k/provider.py