[Local catalog] Handle variation ids in dotcom errors

[joshheald]

Description

This PR updates our handling of missing variations at POS checkout to work correctly with DotcomError as it already did with NetworkError.

DotcomError is returned when your requests are going through the WPCom tunnel, which was recently updated to return the data object in these errors.

This PR updates our DotcomError enum to make that data available, similar to how it is with NetworkError, and use it in the same way in the POSOrderService when checking out.

The PR's a bit big because I opted to make the error data available everywhere, so we can use it better in future.

Test Steps

1. Using WPCom credentials, log in to a site with the variation IDs returned in checkout errors (e.g. woocommerce-tester.mystagingwebsite.com – there's a core change on there which isn't in core yet. Alternatively, use a jurassic ninja site with this PR deployed: Include variation_id in order item invalid variation error data woocommerce#62240)
2. Add a variation to your POS cart
3. In WP-Admin, delete that variation
4. Check out
5. Observe that the variation's name is shown in the error, and it can be removed using a button at check out (no need to go back and edit the order)

Screenshots

variation.errors.with.dotcom.error.mp4

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

[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	pr16430-96d9ab1
	Version	23.8
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	96d9ab1
	Installation URL	00l1lpbv91s6g

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

[iamgabrielma]

I'm having troubles logging into a jurassic ninja site with the PR loaded ( logged at WOOMOB-1850 ), would you mind to invite me to one of your sites where this PR is active?

[joshheald]

@iamgabrielma You already have an account on https://woocommerce-tester.mystagingwebsite.com/ which has the fix 👍

[iamgabrielma]

Works well! 🚀