test,tools: increase pummel/benchmark test timeout from 4x to 6x

The win10-COMPILED_BY-vs2019 hosts in CI are very slow and timing out on
certain tests in pummel and (previously) benchmark. Increase timeout
from 4x to 6x.

PR-URL: https://github.com/nodejs/node/pull/40684


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Voltrex <mohammadkeyvanzade94@gmail.com>