Fix project local dev exit cleanup

[brandenrodgers]

Description and Context

Fixes #953

There were a handful of issues in our handleExit util. It's the util that attempts to catch the various different exit signals, which allows us to gracefully exit the process. The major things I changed:

• Only trigger the exit once (We were sometimes triggering multiple times, especially when uncaughtException is triggered)
• Prevent interacting with stdout when the parent terminal is closed
• Adds a debug log to the termination callback to make it easier to figure out what's happening

This article was a useful resource: https://thomashunter.name/posts/2021-03-08-the-death-of-a-nodejs-process

Screenshots

TODO

Who to Notify

[camden11]

LGTM