See #22303 (dist): Open drone image as background image
Add additional files to be merged in META-INF
for JAI (this fixes an issue where ShadedRelief
could not be found).
This is done by modifying build.xml to concat
multiple files with the same path and name in
different jar files together
Add CompressorSpi and DecompressorSpi so that
compressed image formats can be read. This
requires us to call CompressionRegistry#registerApplicationClasspathSpis
with the geotools plugin classloader.