[clang] [CIR] Handle lifetime-extended temporaries in loop conditions (PR #231469)

[Andy Kaylor via cfe-commits]

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

lgtm -- The NYI for throwing destructors is unfortunate, but that definitely needs a bigger change, so I'm OK with deferring it.

https://github.com/llvm/llvm-project/pull/231469