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

[Björn Schäpers via cfe-commits]

HazardyKnusperkeks wrote:

Never knew that, and I'm sad I do now...
But based on the documentation one could just check the previous token to be one of `={,-+(`.

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