Update job sidebar UI

What does this MR do and why?

• Remove horizontal lines in sidebar body
• Use small badge size for tags
• Use monospace font for commit SHA
• Use blue link color for pipeline ID
• Use : for all labels
• Use new pipeline badge
• Use smaller font size for commit title

(Header button changes are in Move job sidebar buttons to header (!130100 - merged))

Screenshots or screen recordings

Before	After

How to set up and validate locally

Go to a job (ie http://localhost:3000/gitlab-org/gitlab-test/-/jobs/926)

UX Paper Cuts 16.4 → Pipelines and Jobs (#408231 - closed)