[clang] [clang] Do not infer lifetimebound for functions with void return type (PR #131997)

[Haojian Wu via cfe-commits]

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

It would be nice to have have a test for it. I think it should not be too hard to add one. 

https://github.com/llvm/llvm-project/pull/131997