Upgrade OpenBao to 2.4.4
## Summary
Upgrade OpenBao to version [2.4.4](https://github.com/openbao/openbao/releases/tag/v2.4.4) across all dependent projects in the cascade. (Upgrade to 2.5.0 if available.)
This upgrade provides an opportunity to implement the new version handling outlined in #583133, but this is not a hard requirement for completing the upgrade.
## Projects to Upgrade
1. **openbao-internal** - https://gitlab.com/gitlab-org/govern/secrets-management/openbao-internal
- Update OpenBao mirror to 2.4.4
- Create v2.4.4-gitlab1 release
- Ensure CI pipeline publishes binaries with git tag
2. **CNG** - https://gitlab.com/gitlab-org/build/CNG
- Update `GITLAB_OPENBAO_VERSION` to `v2.4.4-gitlab1`
- Update corresponding build argument in Dockerfiles
- Publish `gitlab-openbao` images (required for steps 3 and 4)
3. **gitlab:** https://gitlab.com/gitlab-org/
- Update `GITLAB_OPENBAO_VERSION` once CNG images are available.
- Update `openbao.rake` with checksums of the new binaries published on https://gitlab.com/gitlab-org/govern/secrets-management/openbao-internal/-/packages. Package version is `v2.4.4-gitlab1`.
5. **OpenBao Chart** - https://gitlab.com/gitlab-org/cloud-native/charts/openbao/
- Update to use OpenBao `v2.4.4-gitlab1` images from CNG
4. **GitLab Chart** - https://gitlab.com/gitlab-org/charts/gitlab
- Update to the new release of the OpenBao Chart.
5. **GitLab Secrets Manager Container** - https://gitlab.com/gitlab-org/govern/secrets-management/gitlab-secrets-manager-container
- Update to use OpenBao `v2.4.4-gitlab1` images from CNG
## Implementation plan
1. [x] Upgrade openbao-internal and release version. https://gitlab.com/gitlab-org/govern/secrets-management/openbao-internal/-/merge_requests/33
2. [x] Validate against CNG on GDK. https://gitlab.com/gitlab-org/gitlab/-/jobs/12635490177
3. [x] Upgrade CNG (Renovate). https://gitlab.com/gitlab-org/build/CNG/-/merge_requests/2780
4. [x] Upgrade OpenBao Chart
5. [x] Upgrade GitLab Chart
6. [x] Upgrade Runway project
## Further details
This upgrades includes [Enable transactional namespace creation #2003](https://github.com/openbao/openbao/pull/2003), which was included in OpenBao 2.4.3 (see [release notes](https://github.com/openbao/openbao/releases/tag/v2.4.3)). Upgrading to 2.4.4 ensures this fix is in place and prevents future database corruption when OpenBao suddenly stops while creating a namespace. See https://gitlab.com/gitlab-org/gitlab/-/issues/568356#note_2953771477
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