fix: MSRV 1.94 exclusively + toolchain components + backend features #246

Job	Run time
clippy/stable	59s
nostd/thumbv6m-none-eabi/stable	41s
native-backend/stable	1m 20s
miri	34s
format/stable	31s
docs/nightly	58s
cross_test/s390x-unknown-linux-gnu/stable	1m 44s
cross_test/i686-unknown-linux-gnu/stable	1m 44s
cargo-careful	42s
Pass MSRV values to other jobs	3s
blas-msrv	1m 1s
tests/beta	1m 3s
tests/stable	58s
tests/1.94.0	1m 13s
conclusion	0s
	13m 31s

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