Add button that shows stage6 yaml file to mc-requests

Buttons to show stage6 yaml file on the web display

Adds in buttons in the mc-requests page to display the stage6 yaml files produced by LbMCSubmit. It shows the full configuration file in the CI page, and when looking at a specific job it will only display the relevant yaml file for that current job.

Full yaml in the CI page

Relevant yaml for the specific job in the jobs page