[clang] [llvm] [CHERI][RISCV][MC] Add support for aligning and tail-padding globals for precise bounds tracking on CHERI targets. (PR #203872)

[Alexander Richardson via cfe-commits]

https://github.com/arichardson commented:

This looks much cleaner to me now, and it sounds like @jrtc27 is happy with using the padded st_size, so I think we should go for this approach.

Commit title needs to also mention AArch64+MTE, or it could be landed in two PRs?

https://github.com/llvm/llvm-project/pull/203872