Add tsan suppression

Summary:
Suppress range iterators that are fixed upstream but haven’t been backported.
python/cpython#142886

Reviewed By: mpage

Differential Revision: D95831100

fbshipit-source-id: c5f782829786d3a3e64eb057e2f99703299c9727

Author: yoney

cinderx/tsan_suppressions_cpython.txt

@@ -10,3 +10,7 @@ race:_PyVectorcall_FunctionInline
 # Dictionary watcher API.
 race:PyDict_Watch
 race:PyDict_Unwatch
+
+# GH-129068: range iterator races in free-threaded CPython
+race:rangeiter_next
+race:longrangeiter_next