Switch Unique behavior from numpy < 2.0 to numpy >= 2.0

[ricardoV94]

Description

The behavior changed regarding the shape of return_inverse. We patched our perform mode to behave like the old numpy, but we should change it now that we are only compatible with numpy 2.0

pytensor/pytensor/tensor/extra_ops.py

Lines 1229 to 1242 in bc0d670

	def perform(self, node, inputs, output_storage):
	[x] = inputs
	outs = old_np_unique(
	x,
	return_index=self.return_index,
	return_inverse=self.return_inverse,
	return_counts=self.return_counts,
	axis=self.axis,
	)
	if isinstance(outs, tuple):
	for i in range(len(outs)):
	output_storage[i][0] = outs[i]
	else:
	output_storage[0][0] = outs