test: increase timeout in vm-timeout-escape-queuemicrotask

It looks like under high load the loop isn't even started and therefore
successfully finishes without 'escaping'. After increasing the timeout
during parallel run of the test failure rate decreased from 15/1000 to
0/1000.

PR-URL: https://github.com/nodejs/node/pull/31966
Refs: https://github.com/nodejs/node/issues/25529


Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>