test(api): Lazy loading integration tests

[lawmicha]

Issue #, if available:

Description of changes:

1. feat(datastore): LazyModel Implementation #2174
2. test(datastore): Lazy loading integration tests #2448
3. test(api): Lazy loading integration tests #2449 (You are here)

Check points: (check or cross out if not relevant)

• Added new tests to cover change, if needed
• Build succeeds with all target using Swift Package Manager
• All unit tests pass
• All integration tests pass
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• Documentation update for the change if required
• PR title conforms to conventional commit style
• If breaking change, documentation/changelog update with migration instructions

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.