Add Merge request (MR) link in a pipeline email
Description
When you got an email of pipeline failure or success, there is no link to MR in the mail. You can jump to a branch or commit page which triggered the pipeline, but there are no links as well. So that every time when I want to jump to the MR, I have to search from MergeRequest index page.
Proposal
If there is a relevant merge request related to the pipeline, Show the MR link in mail.