test: set test-worker-nearheaplimit-deadlock flaky

The test is only flaky on x86 Windows.

Fixes: nodejs#50220
PR-URL: nodejs#50238
Refs: nodejs#49962
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Vinícius Lourenço Claro Cardoso <contact@viniciusl.com.br>
Reviewed-By: Michael Dawson <midawson@redhat.com>

test/parallel/parallel.status

@@ -14,6 +14,10 @@ test-fs-rmdir-recursive: PASS, FLAKY
 # https://github.com/nodejs/node/issues/49985
 test-runner-watch-mode: PASS, FLAKY
 
+# Windows on x86
+[$system==win32 && $arch==x86]
+test-worker-nearheaplimit-deadlock: PASS, FLAKY
+
 # Windows on ARM
 [$system==win32 && $arch==arm64]