chore(cli): generate profiler output file on process exit event

[Eazash]

Description

This PR moves writing the profiler output to the exit process event. This is to ensure both single-pass and watch mode consistently write the profiler file as the event will be fired on explicit process.exit() or any unhandled exceptions

Related #10382

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• I have followed the CONTRIBUTING doc and the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Further comments

I had explored using the shutdown method of the watcher but I was unable to reliably trigger that method as the SIGINT and SIGTERM event listeners weren't being called when stopping the watcher with CTRL + C or an explicit SIGINT signal with kill. I plan to further explore this in the future but this was why I opted to use the exit event

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Latest commit: b4440df

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