[NES] Next Edit Suggestion data privacy and allow to change model provider

I want to point out that enabling by default something that copy my text on the internet is probably not data privacy friendly if done without consent.
It becoming very unclear to me what is accessible or not and what is the usage if anything is stored in copilot endpoints.

NES as any telemetry option should not be enabled by default or at least without notice.

Also NES is the only AI tool where it is actually not possible to change the provider. Is there any reason behind that?

Start by locating the Next Edit Suggestion (NES) settings and its telemetry or Copilot endpoint entry points; the issue names no files or tests. Trace what data is sent and how the model provider is selected. Done would require an agreed privacy-conscious default and a supported way to change the provider, with the behavior documented and tested.

Written by the indexing model from the issue text.