[POS Orders] Add createdVia attribute to Order data model, and migrate to model 123

[iamgabrielma]

Closes WOOMOB-702

Description

This PR updates core data with a new model version 123, which adds the createdVia attribute to the Order model. This will be needed as part of POS Orders to persist the value of created_via that we receive from the API in order to set orders created via specific sources.

We're already parsing this value in OrdersRemote as OrderCreationSource, but at the moment we're not doing anything with it.

Testing information

No usage of the property yet, the app should run when opened, and freshly installed (no crashes due to core data migrations). CI should pass.

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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.

[dangermattic]

	1 Warning
⚠️	This PR is larger than 300 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.

Generated by 🚫 Danger

[iamgabrielma]

👋 only one review is needed, added folks from different teams just because core data

[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	30861
	Version	PR #15836
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	98aafbd
	Installation URL	0hqd3omtffic0

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

[itsmeichigo]

Confirmed that the app builds successfully.