Updating postman tests to also run through legacy endpoints

[jdalphond-mitre]

Summary

Adds a legacy org/user Postman flow alongside the registry flow to guard against response-format regressions.

Important Changes

src/scripts/test_data/postman/cve-services-registry.postman_collection.json

• Adds legacy create, get, list, update, quota, secret-reset, and authentication requests.
• Chains legacy and registry flows so one collection run executes both.
• Adds assertions for legacy response fields and absence of registry-only fields.

Testing

• Imported and ran the Postman collection.
• 47 assertions passed.

Notes

• The untracked registryOrgReservationLockTest.js is not part of this change.