Don't prepend commit SHA with # in registries

What does this MR do and why?

Describe in detail what your merge request does and why.

Screenshots or screen recordings

Before

See https://gitlab.com/gitlab-org/gitlab/-/packages/11725815:

After

See https://gitlab-review-dont-prepe-keooj9.gitlab-review.app/root/sample-project0/-/packages/2:

How to set up and validate locally (or in the Review App)

1. Upload a generic package through CI/CD
2. Open the package page
3. The commit SHA isn't prepended by a #

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.