[NEW PORT] math/py-pdal: PDAL Python bindings

Description:
PDAL Python support allows you to process data with PDAL into Numpy arrays. It supports embedding Python in PDAL pipelines with the readers.numpy and filters.python stages, and it provides a PDAL extension module to control Python interaction with PDAL.
Additionally, you can use it to fetch schema and metadata from PDAL operations.

Context:
Python plugin is removed from math/pdal and is available at https://pypi.org/project/PDAL/

Approved by: tcberner (mentor)