Tries to stabilize MSRV CI/CD. (#1485) #394

Job	Run time
clippy/stable	24s
Pass MSRV values to other jobs	2s
docs/nightly	24s
miri	8m 18s
format/nightly	13s
nostd/thumbv6m-none-eabi/stable	10s
cross_test/i686-unknown-linux-gnu/stable	2m 8s
cargo-careful	2m 9s
cross_test/s390x-unknown-linux-gnu/stable	7m 24s
tests/beta	3m 7s
tests/nightly	3m 6s
blas-msrv	59s
tests/stable	2m 49s
tests/1.64.0	4m 30s
conclusion	3s
	35m 46s

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