Add PartialEq implementations between ArrayRef and ArrayBase #573

Job	Run time
Pass MSRV values to other jobs	2s
miri	11m 3s
format/nightly	12s
docs/nightly	20s
nostd/thumbv6m-none-eabi/stable	14s
clippy/stable	16s
cross_test/s390x-unknown-linux-gnu/stable	8m 22s
cross_test/i686-unknown-linux-gnu/stable	2m 2s
cargo-careful	2m 0s
blas-msrv	45s
tests/1.64.0	3m 30s
tests/beta	2m 17s
tests/nightly	3m 12s
tests/stable	2m 44s
conclusion	2s
	37m 1s

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