Gaussian blur #1726

Job	Run time
build_benchmarks	44s
Fuzz targets (afl)	2m 11s
cargo-deny	19s
Fuzz targets (cargo-fuzz)	51s
cargo-semver-checks	33s
clippy	2m 4s
public_private_dependencies	24s
rustfmt	17s
test_avif_decoding	1m 33s
test_other_archs (powerpc-unknown-linux-gnu)	2m 34s
test_features	31s
test_other_archs (i686-unknown-linux-gnu)	1m 40s
test_toolchains (1.70.0)	28s
test_features (default)	1m 48s
test_toolchains (nightly)	1m 42s
test_features (rayon)	29s
test_toolchains (beta)	2m 6s
test_features (avif)	1m 3s
test_features (bmp)	27s
test_features (dds)	32s
test_features (exr)	45s
test_features (ff)	28s
test_features (gif)	29s
test_features (hdr)	28s
test_features (ico)	29s
test_features (jpeg)	39s
test_features (png)	26s
test_features (pnm)	28s
test_features (qoi)	27s
test_features (tga)	37s
test_features (tiff)	40s
test_features (webp)	31s
	28m 43s

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