[clang] [Clang] Mark this pointer in destructors dead_on_return (PR #166276)

[Aiden Grossman via cfe-commits]

boomanaiden154 wrote:

> I'll want to skim the "mechanical" update to be sure there aren't any unexpected effects. Otherwise LGTM

Just pushed the test update. Some of the OpenMP tests had some unrelated diff for tests that used update_cc_test_checks. I've just left it in for now, but can also pull that diff out into a separate PR/omit it altogether if preferred.

https://github.com/llvm/llvm-project/pull/166276