[test] Unit test design for poisson surface reconstruction

Context

The poisson surface reconstruction algorithm needs a new unit test. The currently existing test is not very robust and has been made using some unknown empirical readings.

Current Test: https://github.com/PointCloudLibrary/pcl/blob/665a58ce52e0a8875fd421df8270cccdc5bd21c4/test/surface/test_poisson.cpp#L67-L90

Expected behavior

A new robust test is needed, which is deterministic and is hopefully not based on empirical readings.