feat(top-issues): use new cluster-level descriptors (#104567)

Use`error_type`, `impact`, and `location` replacing summary, and move
the description to a new tab for "root cause".
Example:
<img width="593" height="300" alt="Screenshot 2025-12-09 at 8 48 54 AM"
src="https://github.com/user-attachments/assets/ef4eabec-a292-4451-8314-6a193dde5fda"
/>

Author: cvxluo