test: mark async-hooks/test-statwatcher as flaky

Refs: #21425

PR-URL: #22330
Reviewed-By: Rod Vagg <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>

Author: joyeecheung

test/async-hooks/async-hooks.status

@@ -7,8 +7,12 @@ prefix async-hooks
 [true] # This section applies to all platforms
 
 [$system==win32]
+# https://github.com/nodejs/node/issues/21425
+test-statwatcher: PASS,FLAKY
 
 [$system==linux]
+# https://github.com/nodejs/node/issues/21425
+test-statwatcher: PASS,FLAKY
 
 [$system==macos]