Fix region error braintree

[larsroettig]

Description

When shipping information is set to a UK address, a region error is displayed within the Braintree Payment section, after clicking "Review Order"

Variable "$region" got invalid value null; Expected non-nullable type String! not to be null.

https://develop.pwa-venia.com/
https://venia.magento.com/

Steps to reproduce

Add item to cart (develop.pwa-venia.com)
Go to checkout
Enter UK address for Shipping Information
Set any Shipping method
Enter credit card (Braintree) info, and check Billing address same as shipping
Click "Review Order"
Form error message displays
Able to review, and place order

Related Issue

Closes PWA-1823

Acceptance

• Able to complete checkout with UK, France, and US addresses.
• Check with different shipping and billing addresses
• Update MFTF test to account for UK address

Verification Stakeholders

Specification

Verification Steps

Test Plan

Test scenario(s) for direct fix/feature

Example

• Verify user is able to apply filters on category page
• Verify user is able to apply filters on search page

Test scenario(s) for any existing impacted features/areas

Example

• Verify user is able to sort data after applying filters on category page
• Verify user is able to sort data after applying filters on search page

Test scenario(s) for any Magento Backend Supported Configurations

Example

• Update default Sort value in backend and repeat above scenarios

Is Browser/Device testing needed?

Example

• Yes, browser testing is needed as X UI component may be impacted on
• Yes, device testing is needed as X UI component may be impacted on <mobile|desktop|etc>

Any ad-hoc/edge case scenarios that need to be considered?

Example

• Apply all filters to get 0 results and then remove filters to see respective products

Screenshots / Screen Captures (if appropriate)

Breaking Changes (if any)

Checklist

• I have added tests to cover my changes, if necessary.
• I have added translations for new strings, if necessary.
• I have updated the documentation accordingly, if necessary.

[PWAStudioBot]

	Messages
📖	Associated JIRA tickets: PWA-1823.
📖	DangerCI Failures related to missing labels/description/linked issues/etc will persist until the next push or next nightly build run (assuming they are fixed).
📖	Access a deployed version of this PR here. Make sure to wait for the "pwa-pull-request-deploy" job to complete.

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[supernova-at]

QA

📝 In Progress

• MFTF
• Cypress
• Test Plan
• Lighthouse
• Alternate Browsers