Correctly infer qa-image from development gitlab image

What does this MR do and why?

Describe in detail what your merge request does and why.

Currently, when single dev image built by omnibus mirror is provided, gitlab-qa will incorrectly infer qa-image, it will return qa image with omnibus mirror registry where qa images are not published.

Set correct registry when running omnibus mirror built dev image.

MR acceptance checklist

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