Untwine crashes while reading some las files with incorrectly specified global wkt encoding bit

[harveybia]

Some las files have incorrectly specified global wkt encoding bit, an example file can be found here (credit to qgis/QGIS#51862 (comment)): https://drive.google.com/file/d/17VvGIpInvSQk1sSlA6kOBzQ5ppHUJQyW/view

untwine --files /path/to/e6280n58255_orbost_2019apr02_mpts-c2_v10cm_ahd-mga55.laz --output_dir /tmp/out.laz --single_file
Untwine Error: readers.las: Global encoding WKT flag not set for point format 6 - 10.

This can be worked around by specifying --nosrs to PDAL's reader.las pipeline (see: PDAL/PDAL#3818). Currently in untwine there is no way to do that. This PR allows us to pass nosrs to the reader:
#164

[abellgithub]

Is there some reason that you can't correct your file?

[harveybia]

Is there some reason that you can't correct your file?

One technically could, through:
https://gist.github.com/wburt/f0c5a91cc5c30a1c8719adde7ba951d0

But for us providing a way to make the conversion pipeline robust to bad WKT without modifying user uploaded files is very helpful.

[harveybia]

Closing this as this is now merged:
#164
Also according to hobu, PDAL will relax broken las global encoding WKT flag to a warning for version 2.7.2+