Add ImageDecoder::orientation method #1602

Job	Run time
build_benchmarks	45s
cargo-deny	17s
Fuzz targets (cargo-fuzz)	50s
cargo-semver-checks	26s
Fuzz targets (afl)	2m 8s
clippy	2m 22s
public_private_dependencies	25s
rustfmt	3s
test_avif_decoding	1m 25s
test_features	28s
test_features (default)	1m 41s
test_other_archs (powerpc-unknown-linux-gnu)	2m 29s
test_toolchains (1.67.1)	41s
test_features (rayon)	35s
test_other_archs (i686-unknown-linux-gnu)	1m 36s
test_toolchains (nightly)	1m 14s
test_features (avif)	57s
test_toolchains (beta)	1m 36s
test_features (bmp)	43s
test_features (dds)	46s
test_features (exr)	46s
test_features (ff)	35s
test_features (gif)	31s
test_features (hdr)	31s
test_features (ico)	38s
test_features (jpeg)	29s
test_features (png)	38s
test_features (pnm)	28s
test_features (qoi)	28s
test_features (tga)	34s
test_features (tiff)	39s
test_features (webp)	33s
	28m 17s

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