[clang] [clang] Respect field alignment in layout compatibility of structs (PR #84313)

[Erich Keane via cfe-commits]

https://github.com/erichkeane approved this pull request.

I approve too, i trust you to update the comment for the new *PARAMETER* (not member, I'm a dummy) to make it clear.

https://github.com/llvm/llvm-project/pull/84313