Mark pull mirroring for projects without the license as hard-failed

What does this MR do and why?

Contributes to #367851 (closed)

Removes the feature flag: hard_failure_for_mirrors_without_license

Problem

We ignore the pull mirroring for projects without the valid license. It's not efficient and affects the performance of the query that collects them.

Solution

Mark the pull mirroing projects without the valid license as hard-failed.

MR acceptance checklist

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