test: address flaky worker test
Move test/parallel/test-worker-message-port-transfer-closed.js to
sequential to avoid race condition with setTimeout()
at end of test.
Fixes: https://github.com/nodejs/node/issues/21892
/cc @TimothyGu
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
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