feat(simd): no_std polyfill for tier() cache (#118, sprint A12) #213

Job	Run time
cargo-careful	38s
native-backend/stable	1m 18s
Pass MSRV values to other jobs	4s
miri	31s
format/stable	28s
clippy/stable	51s
cross_test/i686-unknown-linux-gnu/stable	1m 41s
nostd/thumbv6m-none-eabi/stable	37s
cross_test/s390x-unknown-linux-gnu/stable	1m 8s
docs/nightly	57s
blas-msrv	59s
tests/stable	1m 1s
tests/1.64.0	55s
tests/beta	55s
conclusion	0s
	12m 3s

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