Add PR author in CI report + merged by info
# What does this PR do?

As title. The result looks like


<img width="502" alt="Screenshot 2022-05-17 093737" src="https://user-images.githubusercontent.com/2521628/168756091-6969528d-a7c7-492e-89f4-ae3649fb10bd.png">


_The documentation is not available anymore as the PR was closed or merged._