Impl Serialize/Deserialize for FilterType (#2399) #1760

Job	Run time
Fuzz targets (cargo-fuzz)	46s
build_benchmarks	46s
cargo-deny	18s
Fuzz targets (afl)	2m 15s
cargo-semver-checks	38s
clippy	2m 5s
public_private_dependencies	24s
rustfmt	14s
test_avif_decoding	1m 29s
test_other_archs (powerpc-unknown-linux-gnu)	2m 36s
test_features	23s
test_other_archs (i686-unknown-linux-gnu)	1m 44s
test_toolchains (1.70.0)	31s
test_features (default)	1m 21s
test_toolchains (nightly)	47s
test_features (rayon)	35s
test_toolchains (beta)	54s
test_features (avif)	1m 2s
test_features (bmp)	29s
test_features (dds)	37s
test_features (exr)	47s
test_features (ff)	23s
test_features (gif)	24s
test_features (hdr)	27s
test_features (ico)	31s
test_features (jpeg)	30s
test_features (png)	33s
test_features (pnm)	29s
test_features (qoi)	26s
test_features (tga)	33s
test_features (tiff)	32s
test_features (webp)	30s
	25m 59s

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