#9664123 Site Monitoring: Replace ‘Cache efficiency’ chart with http_verb chart

Related to Automattic/dotcom-forge#4505

The data used for the cache hits chart is not really adding value as it is not reliable. Instead of the cache hit chart we want to display the HTTP Verbs chart.

Proposed Changes

• Replace the cache hit chart with an HTTP request methods chart.
• Wrap the useAggregateSiteMetricsData function with a function that filters out the verbs we don’t want to include in the chart.
• Add colors for the various HTTP methods that are included in the chart

Testing Instructions

• Go to the site monitoring page and verify that the cache hit chart is replace with a HTTP method chart.
• Ensure that we are displaying POST, GET, PUT, PATCH, HEAD and DELETE requests and no other HTTP verbs.

Pre-merge Checklist

• Has the general commit checklist been followed? (PCYsg-hS-p2)
• https://wpcalypso.wordpress.com/devdocs/docs/testing/index.md for your changes?
• Have you tested the feature in Simple (P9HQHe-k8-p2), Atomic (P9HQHe-jW-p2), and self-hosted Jetpack sites (PCYsg-g6b-p2)?
• Have you checked for TypeScript, React or other console errors?
• Have you used memoizing on expensive computations? More info in Memoizing with create-selector and Using memoizing selectors and Our Approach to Data
• Have we added the “[Status] String Freeze” label as soon as any new strings were ready for translation (p4TIVU-5Jq-p2)?
• For changes affecting Jetpack: Have we added the “[Status] Needs Privacy Updates” label if this pull request changes what data or activity we track or use (p4TIVU-ajp-p2)?