Implement Sync for ArrayParts #562

Job	Run time
cross_test/s390x-unknown-linux-gnu/stable	8m 28s
format/nightly	13s
clippy/stable	38s
miri	10m 46s
cross_test/i686-unknown-linux-gnu/stable	1m 57s
nostd/thumbv6m-none-eabi/stable	27s
Pass MSRV values to other jobs	2s
docs/nightly	22s
cargo-careful	2m 13s
tests/beta	2m 53s
tests/stable	2m 44s
blas-msrv	49s
tests/nightly	3m 10s
tests/1.64.0	3m 38s
conclusion	3s
	38m 23s

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