JPEG compression for orthophoto handles alpha channels incorrect.

[petoor]

This issue origins from another issue

The resulting odm_orthophoto.tif when passing --orthophoto-compression JPEG cant be understood by libtiff5-dev

This can be fixed by gdal_translate by running
gdal_translate odm_orthophoto.tif odm_orthophoto_jpeg.tif -b 1 -b 2 -b 3 -mask 4 -co COMPRESS=JPEG -co PHOTOMETRIC=YCBCR
from the official documentation
https://gdal.org/en/stable/programs/gdal_translate.html

passing the alpha channel with the -mask parameter