[bug] repo-sync `release:ecr` stage is missing its harbor project reference to `bigbang-ci`
Likely broken in !789, will figure out how and push a hotfix
## Error log
Note the suspicious `//` in the image URLs (`registry1.dso.mil//repo-sync`)... that wasn't there before. Suggests a required CI variable went away.
```console
$ crane auth login -u AWS -p $(aws ecr get-login-password) $IMAGE_DEPLOY_REGISTRY
2024/12/19 18:58:12 logged in via /root/.docker/config.json
$ echo "mirroring ${SRC_IMAGE} to ${DEST_IMAGE}"
mirroring registry1.dso.mil//repo-sync:ab3f8c89 to 141078740716.dkr.ecr.us-gov-west-1.amazonaws.com/repo-sync:ab3f8c89
$ crane copy "${SRC_IMAGE}" "${DEST_IMAGE}"
2024/12/19 18:58:12 Copying from registry1.dso.mil//repo-sync:ab3f8c89 to 141078740716.dkr.ecr.us-gov-west-1.amazonaws.com/repo-sync:ab3f8c89
Error: fetching "registry1.dso.mil//repo-sync:ab3f8c89": GET https://registry1.dso.mil/v2//repo-sync/manifests/ab3f8c89: BAD_REQUEST: bad request: invalid repository name: repo-sync
```
## Notes
- Sample failure job [release:ecr](https://repo1.dso.mil/big-bang/team/tools/repo-sync/-/jobs/40895465)
- the image was [pushed successfully in the previous step](https://repo1.dso.mil/big-bang/team/tools/repo-sync/-/jobs/40891692) to `registry1.dso.mil/bigbang-ci/repo-sync@sha256:708ff0c17f18f3eda5b042beeb1152262a7a07bda73552267e0e242ea866f606`
issue