59701 Change how we represent UK addresses

[data-doge]

Summary

Change how we represent UK addresses to BIS

Before this PR, if the veteran provided an international_postal_code (i.e. GBR), we used an IsoCountryCodes class to automatically expand that to "United Kingdom of Great Britain and Northern Ireland", which exceeds BIS's 50 character limit for countries by two characters. No other country exceeds the 50 character limit. BIS told me that they use "United Kingdom" for the UK. This PR adds in that exception, along with some minor refactoring.

I am on the benefits decision reviews team, which is currently responsible for the 686c form.

Related issue(s)

department-of-veterans-affairs/va.gov-team#59701

Testing done

Added unit tests. Will monitor DataDog to verify that UK-related errors disappear.

Screenshots

What areas of the site does it impact?

686c form.

Acceptance criteria

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• No error nor warning in the console.
• Events are being sent to the appropriate logging solution
• Documentation has been updated (link to documentation)
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Feature/bug has a monitor built into Datadog or Grafana (if applicable)
• If app impacted requires authentication, did you login to a local build and verify all authenticated routes work as expected
• I added a screenshot of the developed feature

Requested Feedback

N/A

[ryan-mcneil]

👌

Please note that going forward we'll be a bit more pushy about getting reviews done by members of your own team first, as we don't necessarily have the context to confirm that changes appropriately respect the business needs of the ticket. Without it, we have to spend considerably more time looking at the changes (like today's, which can easily get disrupted by higher priority things). We're mostly here to make sure nothing looks too scary or lacks tests, is appropriately using secrets/param store, etc. Thanks in advance!