#7561230 Cancel Purchase: show marketplace subscriptions dialog.

Proposed Changes

• Displays the following Dialog in both Cancellation flow and Cancellation and refund flow

• The Dialog is displayed when the user tries to either Remove or Cancel a Plan, and it has active Marketplace subscriptions. For example, the user has WooCommerce Bookings and a Businesss plan and tries to remove or cancel the Business plan.
• The following is a table with three different scenarios when removing/cancelling a purchase

Note That some recent changes have changed the wordings and removed the and Refund words, comment here

Removal Flow	Cancellation Flow	Cancellation and Refund Flow
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• This PR will only affect the Cancellation flow (the last two columns above), and the existing Removal flow (first column) has not been modified
• The changes suggested are:
  • Update the logic in the cancellation flow to display the modal when cancelling a plan
  • Iterate over all the subscriptions and either cancel or cancel and refund them when required
  • Adds two new async methods that will be used in the previous log instead of using callbacks

Testing Instructions

Scenario 1: Cancel and Refund:

• Go to https://wordpress.com/
• Switch to a Simple site
• Purchase a Business plan with a credit card (you can use the Sandbox store if you don’t want to enter an actual credit card: PCYsg-IA-p2#sandbox)
• Go to Plugins
• Purchase a paid plugin with a credit card
• Go to Upgrades > Purchases
• Cancel and Refund the Business plan
• Make sure a Dialog is displayed asking for confirmation. The Dialog should refer to the Cancel flow instead of Remove in the wordings.
• Click on Continue
• Make sure that both the plan and the subscriptions have been cancelled and refunded.

Scenario 2: Cancel:

• Go to https://wordpress.com/
• Switch to a Business site that was purchased with a credit card more than 14 days ago
• Go to Plugins
• Purchase a paid plugin with a credit card
• Make sure the plugin has auto-renew activated -> Auto-renew is ON
• Go to Upgrades > Purchases
• Cancel the Business plan
• Make sure a Dialog is displayed asking for confirmation. The Dialog should refer to the Cancel flow instead of Remove in the wordings.
• Click on Continue
• Make sure that the plan is cancelled and the subscription auto-renew is OFF

Scenario 3: Removal flow (this is to check there is no regression in existing functionality):

• Go to https://wordpress.com/
• Switch to a Simple site
• Purchase a Business plan with credits
• Go to Plugins
• Purchase a paid plugin with credits
• Go to Upgrades > Purchases
• Remove the Business plan
• Make sure the following Dialog is displayed https://user-images.githubusercontent.com/11555574/149156886-64d2f4a1-fe99-4209-981a-eeacb417dcf8.png
• Click on Remove Plan & All Subscriptions
• Make sure that both the plan and the subscriptions have been cancelled and refunded.

Pre-merge Checklist

Complete applicable items on this checklist before merging into trunk. Inapplicable items can be left unchecked.

Both the PR author and reviewer are responsible for ensuring the checklist is completed.

• Have you written new tests for your changes?
• Have you tested the feature in Simple, Atomic, and self-hosted Jetpack sites?
• Have you checked for TypeScript, React or other console errors?
• Are we memoizing when appropriate (for expensive computations)? More info in Our Approach to Data and Memoizing with create-selector and Using memoizing selectors
• Have we sent any new strings for translation ASAP?

Fixes #65235