Check for aliasing in `RawViewMut::from_shape_ptr` with a debug assertion #221

Job	Run time
format/nightly	12s
nostd/thumbv6m-none-eabi/stable	15s
clippy/stable	27s
cargo-careful	0s
docs/${{ matrix.rust }}	0s
tests/stable	2m 40s
tests/beta	2m 45s
cross_test/${{ matrix.target }}/${{ matrix.rust }}	0s
tests/nightly	3m 7s
tests/1.64.0	5m 50s
conclusion	1s
	15m 17s

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