simd: SimdProfile fine-grained detection + cpu-* pinning + leaf 7,1 CPUID #426

Job	Run time
hpc-stream-parallel/rayon	1m 27s
clippy/1.95.0	43s
Pass MSRV values to other jobs	2s
nostd/thumbv6m-none-eabi/stable	26s
native-backend/stable	8m 29s
format/stable	20s
tier4-avx512-check	34s
docs/nightly	0s
nightly-simd-polyfill	0s
miri	0s
cargo-careful	0s
cross_test/${{ matrix.target }}/${{ matrix.rust }}	0s
tests/beta	54s
blas-msrv	57s
tests/stable	52s
tests/1.95.0	42s
conclusion	-1s
	15m 25s

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