WIP: Resolve "Add CPU & Memory metrics to k8s cluster page"

What does this MR do?

This is the frontend component of #38783 (moved) which is based on the work in gitlab-org/gitlab-ce!17139

Here is the current state of this feature:

empty state	cluster health

Current limitations:

• The "Install Prometheus" link merely scrolls the page down to the "Applications" section where the user can install Helm Tiller and Prometheus
• The graphs have been repurposed from the environment monitoring page and still require some additional customization and polish to fit neatly into the smaller area on this page. The extra header and borders still need to be removed, and the responsive layout features in which the graphs become oriented vertically in smaller viewport sizes need to be addressed.

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered
• End-to-end tests pass (package-qa manual pipeline job)

What are the relevant issue numbers?

Closes #38783 (moved)