tiff: Support CMYK images #1101

Job	Run time
build_benchmarks	45s
Fuzz targets (afl)	1m 30s
cargo-deny	24s
Fuzz targets (cargo-fuzz)	4m 12s
clippy	2m 10s
public_private_dependencies	22s
rustfmt	12s
test_avif	1m 5s
test_avif_decoding	1m 7s
test_big_endian	41s
test_big_endian (default)	2m 0s
test_features	41s
test_toolchains (1.61.0)	1m 29s
verify_msrv	1m 15s
test_features (default)	1m 21s
test_big_endian (webp)	54s
test_toolchains (nightly)	1m 51s
test_features (gif)	29s
test_big_endian (webp-encoder)	1m 54s
test_toolchains (beta)	1m 50s
test_features (jpeg)	34s
test_features (png)	35s
test_features (tiff)	43s
test_features (ico)	37s
test_features (pnm)	35s
test_features (tga)	27s
test_features (webp)	29s
test_features (bmp)	40s
test_features (hdr)	28s
test_features (dxt)	33s
test_features (dds)	44s
test_features (farbfeld)	33s
test_features (openexr)	48s
test_features (jpeg_rayon)	44s
test_features (webp-encoder)	54s
	35m 36s

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