Allow usage and borrow cleanups #589

Job	Run time
docs/nightly	21s
nostd/thumbv6m-none-eabi/stable	16s
cargo-careful	2m 4s
miri	11m 5s
clippy/stable	33s
cross_test/s390x-unknown-linux-gnu/stable	7m 36s
cross_test/i686-unknown-linux-gnu/stable	1m 49s
format/nightly	14s
Pass MSRV values to other jobs	4s
blas-msrv	43s
tests/stable	2m 20s
tests/1.64.0	3m 32s
tests/nightly	3m 17s
tests/beta	2m 17s
conclusion	4s
	36m 15s

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