#7756359 Copy Site: Update design for Copying Progress step

Proposed Changes

Redesign the Copying Progress step:

• Accept props in ProcessingStep
• Pass Title and Subtitle from the step builder

I didn’t add the < Back to sites button.

Testing Instructions

• Go to /sites
• Click on the action menu on a business site
• Click on Copy Site
• After purchasing the plan, Observe the new Processing copy screen.

Screenshots

Pre-merge Checklist

• Has the general commit checklist been followed? (PCYsg-hS-p2)
• 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)?

• Closes Automattic/dotcom-forge#1480