[reports-service] E-mail: inconsistency report details

Summary:
Commbot messages for inconsistency reports have additional note about inconsistent fields. This diff reproduces this for report service emails.

Depends on D8985

Test Plan:
Created a temporary HTTP endpoint that renders this HTML and opened it in the browser.
Screenshots of the final result in D8988

Reviewers: michal, patryk, jon

Reviewed By: michal

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D8986