[Woo POS] Ensure auto-draft order removal on exit POS

[iamgabrielma]

Closes WOOMOB-88

Description

This PR addresses .autodraft orders not being deleted from storage when we exit POS after checkout, but before completing a payment.

The draft order is created in local storage when we perform POSOrderService.syncOrder(), and should be cleared after collecting a payment and starting a new order. The issue is that clearOrder(), triggered on exiting POS, only clears the in-memory order reference but doesn't delete the autodraft order from the local storage/database. So if payment is not finished and switches the order status, then the autodraft order remains persisted in CoreData until manually refreshed (we can see it disappear as soon as we pull-to-refresh in order list)

Changes

• Upon calling the existing clearOrder() on exiting POS, if we're holding a reference to an order and this is set to autodraft (which only happens between checkout and payment collection) then we delete it.

Steps to reproduce / Testing information

• Using a physical device, enter POS and connect the card reader (physical reader is necessary)
• Add some products to the order and checkout
• Before collecting payment, exit POS and navigate to Orders
• If you are fast enough, you'll see the draft disappear when the order view is loaded, otherwise you should not see the draft order.
• On a new order, confirm that can be completed via card payment, and we can start to a new order normally.

My iPad seems to have died, so I used a physical iPhone and removed the ipad/width restrictions for testing. Sorry for the video!

auto-draft.auto-removed.mp4

---

• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

[dangermattic]

	1 Message
📖	This PR is still a Draft: some checks will be skipped.

Generated by 🚫 Danger

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce iOS Prototype by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce iOS Prototype
	Build Number	pr15975-fc81997
	Version	22.9
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	fc81997
	Installation URL	2p7m78n05t458

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.