[clang] Thread Safety Analysis: Honor try-lock branches of a void conditional (PR #211973)

[Marco Elver via cfe-commits]

melver wrote:

"[Check code formatting / code_formatter (pull_request)](https://github.com/llvm/llvm-project/actions/runs/30138226687/job/89626286907?pr=211973)" failed, please fix before merging.

https://github.com/llvm/llvm-project/pull/211973