See scipy/scipy#12934, where SciPy updated the trapz function.

As part of this change:

• trapz() should alias trapezoid(), but its documentation should be removed (silent alias)
• an OpInfo for trapezoid() should be added
• we should use this opportunity to review documentation for trapezoid()
• we should validate that tests for trapezoid() verify NumPy and SciPy consistency

Usage Info:

• trapz() is used a few times with Facebook. It cannot be removed without a proper deprecation + Torchscript adapter.
• trapz() is a top 250 NumPy operator according to https://github.com/Quansight-Labs/python-api-inspect/blob/master/data/csv/numpy-summary.csv

cc @mruberry @rgommers @heitorschueroff