#7651297 Jetpack Pricing | Add amount saved in bundles to featured item card

Proposed Changes

• This PR adds amount saved text to featured item cards for bundles on Jetpack pricing page.

Testing Instructions

• Do any one of these
  • Click on Jetpack Cloud live link below and wait for the redirect to complete, then goto /pricing
  • or boot up this PR
    • Run git fetch && git checkout add/jp-pricing/featured/amount-saved
    • Run yarn start-jetpack-cloud
    • Goto http://jetpack.cloud.localhost:3000/pricing
• Go to Bundles tab
• Confirm that you see “Save {{amount}}/mo vs buying individually” text inside featured card
• Hover over it
• Confirm that you see a tooltip that says, For details, click on "More about {{product}}"
• Confirm that the design matches figma

Pre-merge Checklist

• Have you written new tests 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)?

Completes: 0-as-1203463248826787/f

• To see the specific tasks where the Asana app for GitHub is being used, see below:
  • 0-as-1203463248826787