[clang] [clang-format] NEVER allow && to be an unary operator. (PR #78852)

[Emilia Kond via cfe-commits]

rymiel wrote:

https://github.com/llvm/llvm-project/issues/61233

The ambiguities this syntax extension can bring are pretty much impossible or at least very hard to always handle, but I'll try to avoid breaking things which weren't already broken.

https://github.com/llvm/llvm-project/pull/78852