Add plugins support in auto update

[pablocampogo]

Add plugins support in auto update

[rem1niscence]

A refactor of the autoupdater code is required in order for this to be scalable and merged for production usage, in the comments I left multiple suggestions on how to do it but basically it resumes into

1. not creating specialized structs PluginRelease but augment the ones that already exists Release
2. Do not create special logic for plugin lifetime on the coordinator but reuse the Supervisor to manage the plugins through it, and the coordinator will simply need to loop through them and update as needed
3. This is not on the comments but also required: Right now the plugin update and canopy release update are done together, that is dangerous and could leave the system on a broken state if any of the plugin fails for whatever reasone, the canopy binary must always run so the plugin lifetime/update must be done separate from the canopy binary

[rem1niscence]

The main takeaway from this review is to not have any hardcoded values in both coordinator.go and updater.go. Add those values to the main.go and pass them as configs

[rem1niscence]

code is getting better, keep up the good work

[rem1niscence]

Do not merge yet