R1:de1a30efc740

Improve audit behavior for "uninteresting" auditors

Summary:
Ref T10939. Fixes T10174. We can currently trigger "uninteresting" auditors in two ways:

- Packages with auditing disabled ("NONE" audits).
- Packages with auditing enabled, but they don't need an audit (e.g., author is a pacakge owner; "NOT REQUIRED" audits).

These audits aren't interesting (we only write them so we can list "commits in this package" from other UIs) but right now they take up the audit slot. In particular:

- They show…