src,test: add regression test for nested Worker termination

This adds a regression test for terminating a Worker inside which
another Worker is running.

PR-URL: https://github.com/nodejs/node/pull/32623
Refs: https://github.com/nodejs/node/pull/32531


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>