fix(gatsby-cli): Clean up on unmount in the ink logger

[vladar]

Description

This should fix the following warning when gatsby CLI (with ink reporter) exits with an error:

Warning: Can't perform a React state update on an unmounted component.
This is a no-op, but it indicates a memory leak in your application.
To fix, cancel all subscriptions and asynchronous tasks in a useEffect cleanup function.

[pieh]

This makes sense. Just with how global gatsby-cli works - users might need to update global gatsby-cli - but there's no way around it.

Thanks!