Re-enable duplicate nullifier tests for spend and swap claims

[cronokirby]

To merge #3962, we disabled these tests, because they were spuriously failing, because the order of checks we performed was different.

These tests expect a specific error message related to duplicate nullifiers, but were spuriously failing because of a message related to incorrect FMD clues.

We should re-enable these tests by fixing the spend preparation to use the right clues.

It might be good to wait until we have planner support in the test framework to upgrade these.