Resolve "Improve code quality widget design"

What does this MR do?

Updates codeclimate UI:

• Removes line numbers
• Adds link to path (commit)
• Uses SVG icons
• Removes monospaced font
• Replaces red failed icon with grey warning one

Note: the by name part is not included since this information will always be codeclimate for now and backend is not sending it.

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
• Conform by the merge request performance guides
• Conform by the style guides
• [] Squashed related commits together

What are the relevant issue numbers?

Closes #2548 (closed)