fix icon colors in commit list

What does this MR do?

bring back svg tag and fill styles to fix ci status icon issues I caused. This means these icons aren't using currentColor, so there is no conflicts with super-specific link color styles.

Real root cause is we are overriding the color of a elements. But fixing that requires adding classes to all links within content-list

Are there points in the code the reviewer needs to double check?

Not really, this reverts to how this was prior to !15476 (merged)

Why was this MR needed?

I am not very good

Does this MR meet the acceptance criteria?

• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together

What are the relevant issue numbers?

Closes #40629 (closed)