Revert "test: Drop no longer needed race:epoll_ctl TSan suppression"

This reverts commit a3f5e54.

Author: MarcoFalke

test/sanitizer_suppressions/tsan

@@ -35,5 +35,8 @@ race:libzmq
 # https://github.com/bitcoin/bitcoin/issues/20618
 race:CZMQAbstractPublishNotifier::SendZmqMessage
 
+# https://github.com/bitcoin/bitcoin/pull/20218, https://github.com/bitcoin/bitcoin/pull/20745
+race:epoll_ctl
+
 # https://github.com/bitcoin/bitcoin/issues/23366
 race:std::__1::ios_base::*