[v10.x] test: mark test-repl-envvars as flaky on AIX
Refs: https://github.com/nodejs/node/issues/21451 Refs: https://github.com/nodejs/build/issues/1377
/cc @nodejs/platform-aix
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Refs: https://github.com/nodejs/node/issues/21451 Refs: https://github.com/nodejs/build/issues/1377
/cc @nodejs/platform-aix