rav1e

arm64: Implement 8bpc `cdef_dist_kernel` #4835

Job	Run time
build-windows (cargo-build, x86_64-pc-windows-msvc)	4m 35s
build-macos (Cargo build (x64), cargo-build, x86_64-apple-darwin)	5m 9s
build-windows (cargo-test, x86_64-pc-windows-msvc)	5m 39s
build-macos (Cargo test (x64), cargo-test, x86_64-apple-darwin)	5m 11s
build-unix (beta-build)	2m 34s
build-windows (cargo-c, x86_64-pc-windows-gnu)	8m 12s
rustfmt-clippy	1m 38s
build-macos (Cargo C-build (x64), cargo-c, x86_64-apple-darwin)	10m 22s
build-unix (1.70.0-tests)	3m 50s
build-macos (Cargo build (Arm64), cargo-build, aarch64-apple-darwin)	3m 46s
build-unix (aom-tests)	4m 23s
build-macos (Cargo C-build (Arm64), cargo-c, aarch64-apple-darwin)	9m 23s
build-unix (dav1d-tests)	5m 0s
build-unix (no-asm-tests)	6m 59s
build-unix (grcov-codecov)	8m 49s
build-unix (bench)	3m 17s
build-unix (doc)	2m 4s
build-unix (cargo-c)	6m 42s
build-unix (check-no-default)	1m 19s
build-unix (check-extra-feats)	2m 21s
build-unix (check-unstable-feats)	2m 10s
build-unix (fuzz)	3m 34s
build-unix (dav1d-tests-arm64, stable)	6m 22s
	1h 53m 19s

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