implement channel remap also for the decoder #204

Job	Run time
retag-continuous	3s
run Ubuntu (legacy)	4m 28s
run Windows (all, GPUJPEG-Windows-all, all, https://developer.download.nvidia.com/compute/cuda/12...	32m 0s
run Ubuntu (all)	13m 51s
run Windows (legacy, GPUJPEG-Windows, 35, https://developer.download.nvidia.com/compute/cuda/11.8...	1h 30m 49s
	2h 21m 11s

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