[llvm] [AArch64][GlobalISel] Legalize <8 x i1> and <16 x i1> loads and stores (PR #210514)

[Ömer Sinan Ağacan via llvm-commits]

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osa1 wrote:

Please move bitcast changes to a new PR if possible. It's OK if this one depends on the new PR with the bitcast changes, we can land the bitcast changes first then review this one. (you can also try using dependent PRs if an existing PR can be made dependent on a newer PR)

https://github.com/llvm/llvm-project/pull/210514