Only summarize reviews from non-authors of merge requests

Problem to Solve

When summarize reviews in a merge request - it currently creates a review summary for anyone who uses the batch comments feature. This is good, because it means anyone can review even if they're not a "reviewer". However, the problem is that if an author responds to lots of feedback from a review using this feature it will also summarize their "review".

Proposal

We should only provide a review summary from non-authors of the merge request. Potentially we could exclude the actual author (person who opened the merge request) and people in the Assignees field (less confident). Alternatively, maybe we only do it for people who aren't git committers/authors?

Availability and Testing

Add feature specs to ensure the author of the MR does not get their review summarized.