test: replace flaky pummel regression tests

These tests were written a long time ago, and use the allocation of
large amounts of unused memory as a way to detect use-after-free
problems with Buffers. As a result, the tests are resource-intensive
and may crash because of that.

Replace them with a more modern test. We don’t explicitly try to
*detect* use-after-free conditions, and instead rely on e.g. ASAN
(or the process just crashing hard) to do that for us.

Fixes: https://github.com/nodejs/node/issues/34527

PR-URL: https://github.com/nodejs/node/pull/34530


Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Andrey Pechkurov <apechkurov@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>