Uses abbreviation for label if english text is not available

[sirugh]

Description

AN (Netherlands Antilles) is not returning full_name_english for some reason. I have opened a bug with core but we can at least get ahead of it by falling back to the abbreviation for sort order.

Related Issue

Closes PWA-673.

Acceptance

Verification Stakeholders

Specification

Verification Steps

1. Go to cart page or checkout page.
2. In any countries dropdown, verify that the order is correct. Abbreviations will appear at the top, as capital letters are "bigger" than lowercase letters.

Screenshots / Screen Captures (if appropriate)

Checklist

• I have added tests to cover my changes, if necessary.

• I have updated the documentation accordingly, if necessary.

[PWAStudioBot]

	Messages
📖	Access a deployed version of this PR here. Make sure to wait for the "pwa-pull-request-deploy" job to complete.
📖	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).
📖	Associated JIRA tickets: MC-35052.

Generated by 🚫 dangerJS against b499096

[devops-pwa-codebuild]

Performance Test Results

The following fails have been reported by WebpageTest. These numbers indicates a possible performance issue with the PR which requires further manual testing to validate.

https://pr-2476.pwa-venia.com : LH Performance Expected 0.85 Actual 0.57, LH Best Practices Expected 1 Actual 0.92
https://pr-2476.pwa-venia.com/venia-tops.html : LH Performance Expected 0.75 Actual 0.36, LH Best Practices Expected 1 Actual 0.92
https://pr-2476.pwa-venia.com/valeria-two-layer-tank.html : LH Performance Expected 0.8 Actual 0.49, LH Accessibility Expected 0.9 Actual 0.89, LH Best Practices Expected 1 Actual 0.92