fix+test: cpu_tier_for_cpu cross-arch + Pillar 12/13/14 drift-checks #427

Job	Run time
format/stable	20s
native-backend/stable	8m 20s
clippy/1.95.0	40s
Pass MSRV values to other jobs	3s
tier4-avx512-check	30s
hpc-stream-parallel/rayon	1m 19s
nostd/thumbv6m-none-eabi/stable	28s
cargo-careful	0s
nightly-simd-polyfill	0s
docs/nightly	0s
miri	-1s
cross_test/${{ matrix.target }}/${{ matrix.rust }}	-1s
tests/beta	11m 40s
tests/stable	11m 14s
tests/1.95.0	10m 25s
blas-msrv	1m 4s
conclusion	-1s
	46m 0s

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