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 18.3.6
https://about.gitlab.com/releases/2025/07/17/gitlab-18-2-released/
https://about.gitlab.com/releases/2025/08/21/gitlab-18-3-released/
This PR:
enos_g5k/driver.py,infra/enos_vmong5k/provider.py