[extension/opamp]: Add mechanism to detect whether the collector has been orphaned

[BinaryFissionGames]

Description:

• Allows the process to monitor a passed in ppid, which should be the parent process ID for the collector. When the parent process ID exits, the extension emits a fatal error event, which triggers a collector shutdown.

Link to tracking Issue: This is part of #32189 - It does not resolve this issue because the supervisor still needs changes to pass the its PID in.

Testing:
Added some unit tests.

I've manually tested it on my macbook with this PR: observIQ#4715
(running supervisor, kill -9 the supervisor, and take a look at the agent logs to see it shut down).

I've tried testing this out on Windows, but the supervisor doesn't get past bootstrapping (the Commander's Stop function does not work on windows), so I wasn't able to fully test it.

Documentation:
Added new parameter to README

[evan-bradley]

Sorry, I forgot to publish my review. Mostly looks good to me, just a few comments. I'll take another look through it shortly.