[Order Details] Display multiple shipping lines in order details

[rachelmcr]

Closes: #12582
⚠️ Based on #12822 ⚠️

Why

This adds support (behind a feature flag) for showing multiple shipping lines in order details.

Previously, we only supported showing the first shipping line on an order. Now, we show a Shipping section with all the shipping lines on an order.

How

• Adds a new feature flag for multiple shipping lines support.
• Adds a HostingConfigurationTableViewCell<Content: View> view that wraps a SwiftUI view in a UITableViewCell. This uses a UIHostingConfiguration instead of UIHostingController; it can be used when HostingTableViewCell<Content: View> can't be used because the parent view isn't available in the current context.
• Adds the new shipping section:
  • Adds the new section and row to OrderDetailsDataSource, and configures each row based on the corresponding shipping line on the order.
  • Updates OrderDetailsResultsControllers to include a shipping methods ResultsController, to fetch the list of shipping methods for the store. This allows us to get the name of the shipping method corresponding to each shipping line on the order.
  • Updates OrderDetailsViewModel to register the new cell and sync the shipping methods for the store (in case they haven't been synced before).

Testing instructions

With the feature flag disabled:

1. Build and run the app.
2. Open an order with multiple shipping lines.
3. Confirm the shipping line notice appears and the shipping method for a single shipping line is shown in the Customer section.

With the feature flag enabled:

1. Build and run the app.
2. Open an order with multiple shipping lines.
3. Confirm the shipping line notice does NOT appear and a shipping section appears with all shipping lines on the order.

Bonus:

• Repeat the steps above for an order with a single shipping line.
• Repeat the steps above for an order without shipping lines, and confirm no shipping section appears.

Screenshots

Before	After

---

• 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 by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce iOS
	Build Number	pr12823-64057fa
	Version	18.7
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	64057fa
	App Center Build	WooCommerce - Prototype Builds #9224

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