[llvm] [CHERI] Add a Support utility for determining alignment requirements of CHERI capabilities. (PR #197402)

[Owen Anderson via llvm-commits]

resistor wrote:

I pushed a change here that reimplements these without LUTs (though the CHERIoT on is still LUT-adjacent, as that is actually how it is specified). The CHERI64 case still doesn't work.

https://github.com/llvm/llvm-project/pull/197402