Draft: Tests for non-purge delete

Summary

Added tests for delete, removed some inter-test dependencies, small refactors.

Depends on SDK and Service changes.

Check List for the Author

• All automated tests pass
• Reference related issues
• Appropriate user and developer documentation for new code
• Annotations in code (Gitlab comments)

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Appropriate user and developer documentation for new code
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.