test: improve disable AsyncLocalStorage test
Improves test-async-local-storage-enable-disable.js
test, as it wasn't covering .disable()
method's behavior as it should. See https://github.com/nodejs/node/pull/31950#discussion_r385535111 for more details.
cc @Qard @vdeturckheim
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
commit message follows commit guidelines