[clang] [clang] Don't warn if the capturing object is also temporary. (PR #117733)

[Haojian Wu via cfe-commits]

hokein wrote:

> It is possible that the temporary capturing object uses the captured entity in its destructor. 

This is a good point. We could potentially limit the suppression to cases where the destructor is trivial, but that might not be worth the added complexity.

Agree that this is probably not a critical issue -- I just noticed it while reading the code. I’m fine with leaving it as is. I have  repurposed this PR to add a test case for it instead.

https://github.com/llvm/llvm-project/pull/117733