[3.13] gh-117657: Avoid `sem_clockwait` in TSAN (GH-119915) (#119992)

The `sem_clockwait` function is not currently instrumented, which leads
to false positives.
(cherry picked from commit 41c1cefbae71d687d1a935233b086473df65e15c)

Co-authored-by: Sam Gross <colesbury@gmail.com>