Remove the 'laz-perf' from LAZPERF_INCLUDE_DIR
Remove the 'laz-perf' from LAZPERF_INCLUDE_DIR

Most projects (e.g. PDAL) want to include laz-perf headers like:

`#include <laz-perf/common/common.hpp>`

LAZPERF_INCLUDE_DIR shouldn't have a laz-perf suffix for this reason.

hobu/laz-perf,abellgithub/laz-perf,abellgithub/laz-perf,verma/laz-perf,abellgithub/laz-perf,hobu/laz-perf,verma/laz-perf,verma/laz-perf,abellgithub/laz-perf,hobu/laz-perf,verma/laz-perf,verma/laz-perf,hobu/laz-perf,abellgithub/laz-perf,hobu/laz-perf