Update "x/x discussions resolved" checkmark icon to be green when all discussions resolved

What does this MR do?

Update "x/x discussions resolved"(.line-resolve-all) checkmark icon to be green when all discussions resolved.

All discussions resolved?	Before	After
true
false

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

• Regressed in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/13821/diffs#79ea7020ff2bdc6a515cb8c8bf815c6e3e436386_779_785 because we were already styling based on currentColor in the note actions but the line-resolve-all was still using explicit fills.

Why was this MR needed?

• "x/x discussions resolved" badge checkmark icon wasn't turning green when all discussions were resolved

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• 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 #37465 (closed)