WOOMOB-1271

Description

Makes sure that the "Split Shipments" feature is not visible for CIAB sites

• Conditionally hides the pencil icon
• Conditionally hides the "Split Shipments" row that's displayed when no shipments yet created.
• Renamed splitShipmentsAvailable -> splitShipmentsRowVisible WooShippingCreateLabelsViewModel. The new splitShipmentsRowVisible accounts CIAB site restrictions.
• Added editSplitShipmentsOptionVisible to WooShippingCreateLabelsViewModel that's determines the pencil icon visibility in shipments panel.
• Added MockCIABEligibilityChecker for testing purposes

The majority of changes come from WooShippingCreateLabelsViewModelTests.swift updates

Non-CIAB site testing case (default behaviour)

• Use a site with shipping plugin active. Make sure the site doesn't contain "garden" or "ciab" in name (this is the temp CIAB / non-CIAB site distinguishing logic).
• Find an order that contains a single shipment with multiple products / items to have the split shipments feature applicable.
• Navigate to the order details
• Navigate to the "Create Shipping Label" flow
• Make sure the "Split shipments" button is displayed next to "Products"

• Find another order that already contains several unfulfilled shipments
• Navigate to order details -> "Create Shipping Label"
• Make sure the "pencil" icon is displayed in shipments tab

CIAB site testing case

• Add "garden" or "ciab" into site name in admin dashboard
• Restart the app and make sure the name change took place
• Repeat steps from Non-CIAB scenario
• Make "Split shipments" and "pencil" buttons are not visible.

Testing information

Tested the above scenarios on iPhone Simulator 18.4.

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