Registry cleanup
Issue: Gitlab onpremise installation (14.4.1) registry disk space increasing rapidly.
## Summary
We have an onpremise Gitlab installation which has 1.5T allocated for registry. The disk was recently extended from 1T to 1.5T. The space is being filled up rapidly. We have the GC cronjob for registry scheduled every weekend. But effectively no space cleaned up by it.
Is there any other way we could cleanup old images/tags from Gitlab registry folder and make some space?
Latest log from registry GC script
```
time="2022-01-16T04:05:59.672+02:00" level=info msg="mark stage complete" blobs_marked=59204 blobs_to_delete=0 duration_s=56.240788625 environment=production go_version=go1.16.4 instance_id=8caa16f4-f624-4883-9d05-bea2cf8ddc5d manifests_to_delete=0 service=registry storage_use_estimate_bytes=0
time="2022-01-16T04:05:59.672+02:00" level=info msg="starting sweep stage" environment=production go_version=go1.16.4 instance_id=8caa16f4-f624-4883-9d05-bea2cf8ddc5d service=registry
time="2022-01-16T04:05:59.672+02:00" level=info msg="sweep stage complete" duration_s=2.1539e-05 environment=production go_version=go1.16.4 instance_id=8caa16f4-f624-4883-9d05-bea2cf8ddc5d service=registry
ok: run: registry: (pid 17891) 1s
```
issue