[JetBains] Fix to continuously observe ports while Gitpod Port Forwarding Service is active #14628
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Description
In #14408 I forgot to add the loop which restarts the observation on Ports from the Supervisor in case of an exception in the Supervisor (e.g. momentaneous connection loss). This PR fixes it. Besides that, it now uses a coroutine instead of a thread for it.
Related Issue(s)
How to test
I'm unsure about how it can be tested. It would need to have an error or disconnection from Supervisor's side.
But you can verify that ports are being forwarded automatically and are being displayed in the Ports View. It shows the service continues working as expected.
Release Notes
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install/preview
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