[clang] [Clang][Sema] Fix -Whigher-precision-for-complex-division (PR #131477)

[Mészáros Gergely via cfe-commits]

Maetveis wrote:

Don't know what's up with buildkite, it looks as if it doesn't like multiple commits? The commit ID its trying to check out is the first in the series, but `git fetch -v --prune -- origin refs/pull/131477/head` is giving it `c62bde990396854bd4015c4ad19894e9297ebe18` which I guess is a squashed commit?

https://github.com/llvm/llvm-project/pull/131477