#7493549 Add header and pricing banner in the new pricing page.

Proposed Changes

• Add an optional title property to the Jetpack cloud pricing Header component to override the existing header text. This allows us to be selective in how we render the header without changing existing components that use it.

• Render Header and ProductStore in the selector with the new title text.

• Display the IntroPricingBanner component in the ProductStore. This is mostly copy/paste to the existing implementation in the ProductGrid component. I did not make a re-usable component out of it so as to not complicate the current ProductGrid implementation.

Testing Instructions

• Boot up this PR
  • Run git fetch && git checkout add/pricing-page-header-and-banner
  • Run yarn start-jetpack-cloud
  • Goto http://jetpack.cloud.localhost:3000/pricing?flags=jetpack/pricing-page-rework-v1
• Or click on Jetpack Cloud live link below
  • Goto /pricing?flags=jetpack/pricing-page-rework-v1
• Confirm that the Header text is visible with the correct text
• Confirm that the pricing banner is visible

• Load the page without the new pricing page by going to http://jetpack.cloud.localhost:3000/pricing or via the Jetpack cloud live link below and goto /pricing.
  • Make sure that the header text is correct and did not load the new text.
  • Make sure that the pricing banner is loading properly.

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)?

Related to 1202796695664022-as-1202838239202323

• To see the specific tasks where the Asana app for GitHub is being used, see below:
  • 0-as-1202838239202323