Create export file for HCA helper utils

[longmd]

Are you removing, renaming or moving a folder in this PR?

• No, I'm not changing any folders (skip to TeamSites and delete the rest of this section)
• Yes, I'm removing, renaming or moving a folder

Did you change site-wide styles, platform utilities or other infrastructure?

• No
• Yes, and I used the proxy-rewrite steps to test the injected header scenario

Summary

This PR creates an exports file for the Helper methods in the Health Care Application. The goal of this is to make importing these methods cleaner and simpler in the necessary sibling files.

Related issue(s)

department-of-veterans-affairs/va.gov-team#60897

Acceptance criteria

• Helpers are successfully available for import and use

Quality Assurance & Testing

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Linting warnings have been addressed

Error Handling

• Browser console contains no warnings or errors.
• Events are being sent to the appropriate logging solution

[longmd]

This needed moved out of the Constants file, as it created a dependency cycle after changing the imports. This is only used in this file, so it makes sense for it to just live here.

[coope93]

I'm glad you made these their own PR's and didn't add them to your others as I had initially suggested. Keeps the changes a lot more manageable and obvious 👍