Update disabilityActionType enum values, add swagger

[mchristiansonVA]

Summary

• Updates disabilityActionType enum values to remove "Secondary" value from primary disabilities enumeration in schema documentation.

Related issue(s)

API-27326

Testing done

Tested locally to confirm updated content appears as expected.

What areas of the site does it impact?

Claims v2 526 documentation, as updated in the following files:
modules/claims_api/app/swagger/claims_api/v2/dev/swagger.json
modules/claims_api/config/schemas/v2/526.json
modules/claims_api/config/schemas/v2/request_bodies/disability_compensation/request.json

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