[local-companion] support self updating

[akosyakov]

Right now:

• either the user should update manually
• or In VS Code Desktop Gitpod extension manages it somehow.

Instead the local companion should support self-updating.

Here is the golang module which can be used a start: https://github.com/sanbornm/go-selfupdate
One can have a look how it was adopted by https://pkg.go.dev/github.com/arduino/arduino-create-agent/updater
It looks we will need to provide new endpoints to enable self updating on ide.gitpod.io, so it depends on running the ide proxy.

[loujaybee]

Removing from inbox for now, will re-visit when we look to move local companion out of beta #7185

[ajhalili2006]

Question is how do self-updates work if I compiled the Local App from source by myself?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.