[3.13] gh-117657: Avoid race in PAUSE_ADAPTIVE_COUNTER
in free-threaded build (GH-122190)
#122475
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The adaptive counter doesn't do anything currently in the free-threaded
build and TSan reports a data race due to concurrent modifications to
the counter.
(cherry picked from commit 2b163aa)
Co-authored-by: Sam Gross [email protected]