Fixes #8775
Fixes #8628

Changes proposed in this Pull Request

The changes in this PR ensure that when we reuse a draft order, it is updated with all necessary details (address, currency, etc.).

Previously, when a draft order was created through the Direct Checkout flow, it was re-used to avoid a "stock: 1" bug (see #7256 for details). However, when reusing the draft order, the order did not include all the necessary information.

Now, when a draft order is created through the Direct Checkout flow, it will still be re-used to avoid the "stock: 1" bug but the order will also be marked as "pending" so that it gets updated (as it normally would) during checkout.

Testing instructions

Confirm issue: Shortcode orders are missing address

• Switch over to the develop branch.
• Confirm the issue is reproducible when following the steps outlined in WooPay's "Checkout as guest" flow removes customer-provided details from order if Direct Checkout is enabled and shortcode checkout is in use #8775.

Confirm solution: Shortcode orders are not missing address

• Switch over to this branch: fix/8775-direct-checkout-shortcode-orders.
• Confirm the issue is not reproducible when following the steps outlined in WooPay's "Checkout as guest" flow removes customer-provided details from order if Direct Checkout is enabled and shortcode checkout is in use #8775.

Confirm issue: Currency switcher doesn't work with shortcode checkout

• Switch over to the develop branch.
• Confirm the issue is reproducible when following the steps outlined in Currency switcher doesn't work with shortcode checkout #8628.

Confirm solution: Currency switcher works with shortcode checkout

• Switch over to this branch: fix/8775-direct-checkout-shortcode-orders.
• Confirm the issue is not reproducible when following the steps outlined in Currency switcher doesn't work with shortcode checkout #8628.

Regression Test: Ensure Purchasing a Product With 1 Stock Does Not Fail (see #7256 for details)

• Ensure the WooPay Direct Checkout flow is enabled.
• Create an item with only 1 stock and run the following test scenarios (you will have to update the stock back to 1 after each test):
  • Use the WooPay button from the cart page and pay through the WooPay checkout.
  • Navigate to the cart page before going to the Merchant checkout and pay through the Merchant checkout (make sure not to type a valid WooPay address in the email field).
  • Navigate to the cart page before navigating to the Merchant checkout and pay through the WooPay Button.
  • Navigate to the cart page before navigating to the Merchant checkout and pay using the WooPay email input.
  • Navigate directly to the Merchant checkout and pay through the Merchant checkout (make sure not to type a valid woopay address in the email field).
  • Navigate directly to the Merchant checkout and pay through the WooPay button.
  • Navigate directly to the Merchant checkout and pay through the WooPay email input.
• Repeat these tests for both the shortcode cart/checkout and, optionally, the wcBlocks cart/checkout.
• As a merchant, ensure the address appears on each order, in the admin dashboard.
• As a merchant, ensure the address appears on each order, in Stripe.

• Run npm run changelog to add a changelog file, choose patch to leave it empty if the change is not significant. You can add multiple changelog files in one PR by running this command a few times.
• Covered with tests (or have a good reason not to test in description ☝️)
• Tested on mobile (or does not apply)

Post merge

• Link to testing instructions from release testing doc following these instructions : Add link here / 'QA Testing Not Applicable'
• Add or update critical flows and testing instructions for critical flows, if applicable.
• Add what's changed (description, screenshot, demo videos etc.) to the release announcement post, if applicable.