Gaussian blur #1743

Job	Run time
Fuzz targets (cargo-fuzz)	50s
Fuzz targets (afl)	2m 12s
cargo-deny	18s
build_benchmarks	47s
cargo-semver-checks	21s
clippy	1m 58s
public_private_dependencies	22s
rustfmt	4s
test_avif_decoding	1m 38s
test_features	18s
test_other_archs (powerpc-unknown-linux-gnu)	2m 13s
test_features (default)	1m 46s
test_toolchains (1.70.0)	28s
test_other_archs (i686-unknown-linux-gnu)	1m 19s
test_features (rayon)	22s
test_toolchains (nightly)	1m 5s
test_features (avif)	54s
test_toolchains (beta)	1m 27s
test_features (bmp)	27s
test_features (dds)	17s
test_features (exr)	34s
test_features (ff)	25s
test_features (gif)	25s
test_features (hdr)	17s
test_features (ico)	28s
test_features (jpeg)	25s
test_features (png)	27s
test_features (pnm)	19s
test_features (qoi)	18s
test_features (tga)	17s
test_features (tiff)	31s
test_features (webp)	21s
	23m 53s

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