Use OCI version of create_gitlab_release Function

This MR uses the elsewhere created OCI version of the create_gitlab_release Function,a dn deletes the local version. I've also bumped the version of two other OCI Functions, though neither have changed functionally.

I have tested this Function works by using it to create new releases of the changelog and upload-to-package-registry Functions.

With this I'm calling Dogfood Step images in Steps Pipeline (#234 - closed) done. There's still a bit more work to do in this area, but I think we're sufficiently dogfooding OCI Functions to claim as much.

Possible future work

• New rc_version Function
• Migrate sign_files Function in step-runner to an OCI Function
• Move build and promote Functions out of step-runner into their own OCI Functions.

Closes Dogfood Step images in Steps Pipeline (#234 - closed)