Update constrainedSolvePNP tests

[samfreund]

photonvision/photon-lib/src/test/java/org/photonvision/PhotonPoseEstimatorTest.java

Line 812 in 5ff025f

public void testConstrainedPnpOneTag() {

This test doesn't actually check that the resulting pose is accurate. We can probably adapt other pose estimator tests for better coverage too.