[clang-tools-extra] [clang-tidy] Make `P +- BS / sizeof(*P)` opt-outable in `bugprone-sizeof-expression` (PR #111178)

[Nicolas van Kempen via cfe-commits]

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

LGTM, nits. Maybe give a bit of time for others to take a look.

https://github.com/llvm/llvm-project/pull/111178