Incorrect on_classical_vals overrides for non classical bloqs

[anurudhp]

I ran into this while implementing #1514. The tensors of these bloq examples seem to have non-trivial phases, which makes them non-classical. The following bloq examples fail in #1514 (I've restricted to bloqs with up to 9 qubits):

sub_from_small

E Mismatched elements: 144 / 65536 (0.22%)
E Max absolute difference: 1.
E Max relative difference: 1.
E x: array([[1., 0., 0., ..., 0., 0., 0.],
E [0., 1., 0., ..., 0., 0., 0.],
E [0., 0., 1., ..., 0., 0., 0.],...
E y: array([[1.+0.j, 0.+0.j, 0.+0.j, ..., 0.+0.j, 0.+0.j, 0.+0.j],
E [0.+0.j, 1.+0.j, 0.+0.j, ..., 0.+0.j, 0.+0.j, 0.+0.j],
E [0.+0.j, 0.+0.j, 1.+0.j, ..., 0.+0.j, 0.+0.j, 0.+0.j],...

cmod_add_k_small

E Mismatched elements: 18 / 1024 (1.76%)
E Max absolute difference: 1.
E Max relative difference: 0.
E x: array([[1., 0., 0., ..., 0., 0., 0.],
E [0., 1., 0., ..., 0., 0., 0.],
E [0., 0., 1., ..., 0., 0., 0.],...
E y: array([[1.+0.j, 0.+0.j, 0.+0.j, ..., 0.+0.j, 0.+0.j, 0.+0.j],
E [0.+0.j, 1.+0.j, 0.+0.j, ..., 0.+0.j, 0.+0.j, 0.+0.j],
E [0.+0.j, 0.+0.j, 1.+0.j, ..., 0.+0.j, 0.+0.j, 0.+0.j],...

moddbl_small

E Mismatched elements: 3 / 256 (1.17%)
E Max absolute difference: 1.
E Max relative difference: 1.
E x: array([[1., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.],
E [0., 0., 0., 0., 0., 0., 0., 1., 0., 0., 0., 0., 0., 0., 0., 0.],
E [0., 1., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.],...
E y: array([[1.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j,
E 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j],
E [0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 0.+0.j, 1.+0.j,...

approx_cswap_small

E Mismatched elements: 120 / 262144 (0.0458%)
E Max absolute difference: 2.
E Max relative difference: 2.
E x: array([[1., 0., 0., ..., 0., 0., 0.],
E [0., 1., 0., ..., 0., 0., 0.],
E [0., 0., 1., ..., 0., 0., 0.],...
E y: array([[1.000000e+00+6.471125e-32j, 0.000000e+00+0.000000e+00j,
E 0.000000e+00+0.000000e+00j, ..., 0.000000e+00+0.000000e+00j,
E 0.000000e+00+0.000000e+00j, 0.000000e+00+0.000000e+00j],...