Remove gl-new-card from failed jobs card

What does this MR do and why?

• Remove gl-new-card from failed jobs card in MR pipelines (more details in Migration: GlCard (gl-new-card variant) to Crud (#476988))
• Other small UI fixes: remove semibold styling, add additional space etc

Screenshots or screen recordings

Before	After

How to set up and validate locally

Project > Merge requests > Merge request > Pipelines tab (with a failed job) > Expand Failed jobs card

Links

• ✂️ UX Paper Cuts 17.3 → Dark mode - Design Support (#452231 - closed)
• Migration: GlCard (gl-new-card variant) to Crud (#476988)