Remove setting in VS Code for Code Suggestions

Background

There are multiple toggles to enable code suggestions in GitLab across instances, groups and user level. Additionally VS Code as a separate settings toggle to enable/disable code suggestions.

Proposal

Option 1

We should remove the setting in VS Code to enable/disable Code Suggestions. Instead, we should default to Code Suggestions being enabled if the extension is installed and setup correctly. Additional ability to toggle suggestions on/off can be done via the icon in the status bar, but that should be default enabled.

Option 2

We should default the user setting to true so that it's enabled by default, but then users could still toggle the feature back off.