Only include files that are necessary for crates.io (#1553) #568

Job	Run time
format/nightly	16s
clippy/stable	27s
Pass MSRV values to other jobs	4s
docs/nightly	22s
miri	10m 58s
nostd/thumbv6m-none-eabi/stable	19s
cross_test/s390x-unknown-linux-gnu/stable	8m 14s
cargo-careful	3m 32s
cross_test/i686-unknown-linux-gnu/stable	2m 48s
blas-msrv	52s
tests/nightly	3m 5s
tests/beta	2m 48s
tests/stable	2m 44s
tests/1.64.0	3m 37s
conclusion	2s
	40m 8s

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