Admin capability to remove reviews

[kineticsquid]

We need a admin capability to remove reviews. There are two basic use cases.

• A random review that violates terms, e.g. clear spam.
• Remove all reviews from a publisher we are in the process of revoking (in addition to removing published extensions and revoking publisher agreement.

[kineticsquid]

This is related to #5255

[chrisguindon]

We should make sure that any deletion action is logged for traceability. This should include who performed the action, what was removed, and when. This will help with accountability and any future compliance needs.

[kineticsquid]

Agreed. This should show up in the admin log with the other admin activity.