/usr/lib/libpdal_plugin_writer_pgpointcloud.so is in libpdal-plugin-pgpointcloud 1.6.0-1build2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libpdal_plugin_writer_pgpointcloud.so.5
/usr/lib/libpdal_plugin_writer_pgpointcloud.so.5