Some of the sharding unit-tests (e.g., NoErrors) expect a different behavior from appendRequiredFieldsToResponse than what the normal execution requires. These tests never initialize LogicalTimeValidator, and expect appendRequiredFieldsToResponse to quick-return.

To fill this gap, SERVER-48013 introduced a fail-point to quick-return from these unit-tests. This fail-point enables successful execution of these unit-tests, but makes such tests observe a non-real behavior for appendRequiredFieldsToResponse.

This ticket should make appropriate changes to these unit-tests to obviate the fail-point, and then remove it.