Bump GitLab Shell to 14.38.0

- Update module gitlab.com/gitlab-org/gitaly/v16 to v16.11.7
- Add basic LFS connections metric for SSH
- Update module google.golang.org/grpc to v1.65.0
- Add basic LFS connections metric for HTTP
- Remove migration section as no longer supported
- Update module gitlab.com/gitlab-org/gitaly/v16 to v16.11.6
- Update dependency ruby to v3.3.4
- Update Ruby to 3.3.4
- Update module golang.org/x/crypto to v0.25.0
- Update github.com/charmbracelet/git-lfs-transfer digest to bacbfdb
- Restructure CI jobs
- Update dependency golang to v1.22.5