* Initial implementation of plugin remote source
* Implement API route
* Test API route
* Add i18n
* Handle different error cases in API route
* Include missing i18n translation
* Include AllowInsecureDownloadUrl in telemetry capture
* Updates from PR feedback
* Use HTTPService instead of http.Get
* Remove InstallPluginFromUrlForced from client4
* Use net/url library to inspect url scheme
* remove PluginDownloadUrl from web/params.go
* Allow plugin downloads from internal sources
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