Unblock MRs - always run download-knapsack-report

What does this MR do and why?

!97247 (merged) made changes to review app jobs, which seems to have lead to broken pipelines in some MRs, e.g.: https://gitlab.com/gitlab-org/gitlab/-/pipelines/641739116

This makes the missing job download-knapsack-report always run, just to unblock MRs until a proper fix can be made.

MR acceptance checklist

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