imagecodecs 2024.9.22 produces excessively large output files

[w-m]

A Python environment with a current version of imagecodecs produces excessively large files.

For the Truck scene with the ours_q_sh_local_test configuration in jxl_quant_sh compression, we expect ~28.8 MB, which we get with imagecodecs 2023.9.18. Here are the results with a current imagecodecs side by side:

Filename	imagecodecs==2023.9.18	imagecodecs==2024.9.22
_features_dc.jxl	1.3 MB	3.1 MB
_features_rest.jxl	16.7 MB	90.6 MB
_opacity.jxl	421.7 kB	2.8 MB
_rotation.jxl	1.5 MB	7.1 MB
_scaling.jxl	2.6 MB	12.8 MB
_xyz.jxl	6.2 MB	12.0 MB
Total Size	28.7 MB	128.3 MB

Needs an investigation why there is such a large (4x) regression in file sizes with different imagecodecs versions.