Rename Layout to LayoutBitset (#1563) #580

Job	Run time
clippy/stable	21s
nostd/thumbv6m-none-eabi/stable	16s
miri	10m 52s
format/nightly	12s
docs/nightly	21s
cargo-careful	1m 41s
cross_test/s390x-unknown-linux-gnu/stable	8m 50s
cross_test/i686-unknown-linux-gnu/stable	2m 10s
Pass MSRV values to other jobs	3s
tests/stable	2m 15s
tests/nightly	2m 32s
tests/1.64.0	3m 31s
tests/beta	2m 25s
blas-msrv	45s
conclusion	3s
	36m 17s

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