Allow usage and borrow cleanups #590

Job	Run time
nostd/thumbv6m-none-eabi/stable	16s
cross_test/i686-unknown-linux-gnu/stable	1m 40s
cross_test/s390x-unknown-linux-gnu/stable	8m 17s
docs/nightly	21s
format/nightly	15s
miri	9m 42s
Pass MSRV values to other jobs	4s
clippy/stable	19s
cargo-careful	2m 7s
blas-msrv	50s
tests/beta	2m 51s
tests/nightly	3m 9s
tests/stable	2m 21s
tests/1.64.0	3m 27s
conclusion	2s
	35m 41s

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