[clang] [clang][NFC] Format clang/lib/Sema/Sema.cpp (PR #83974)

[Chuanqi Xu via cfe-commits]

ChuanqiXu9 wrote:

I remember we have policies that we don't like patches which purely formats codes. It makes backporting and cherry-picking harder. But I can't find the wording now.

CC: @AaronBallman @Endilll 

https://github.com/llvm/llvm-project/pull/83974