src: add --heapsnapshot-near-heap-limit option

This patch adds a --heapsnapshot-near-heap-limit CLI option
that takes heap snapshots when the V8 heap is approaching
the heap size limit. It will try to write the snapshots
to disk before the program crashes due to OOM.

PR-URL: https://github.com/nodejs/node/pull/33010
Refs: https://github.com/nodejs/node/issues/27552


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>