Warn when auth extension is disabled

Issue Type: <b>Bug</b> 1. Cmd + P -> "Live Share: Sign in" 2. Select "Sign in with Microsoft account" 3. Nothing happens for a few seconds 4. Get a popup with the following error message: "Signing in: Auth token returned by microsoft provider is empty." I never go through any sign in process and vscode does not open a browser window for me to sign in, which leads me to believe that maybe there's some invalid value stored in the extension context. I have previously been able to use Live Share for months. It only stopped working recently. I have not been able to figure out how I can clear the secret storage for an extension. Reinstalling the extension does not solve the issue, nor does reinstalling vscode itself, presumably because of #123817. If I do the same thing using Insiders it works, so either there's a bug that's been fixed in Insiders without me being able to find any related issue or PR, or I have some messed up state that isn't shared between Code and Insiders. EDIT: Indeed, moving `~/Library/Application Support/Code` to another location fixes it, but then I also lose all my settings and such, which is what I'm trying to avoid. How can I delete just the storage for the Microsoft authentication? VS Code version: Code 1.66.2 (Universal) (dfd34e8260c270da74b5c2d86d61aee4b6d56977, 2022-04-11T07:49:20.994Z) OS version: Darwin x64 21.4.0 Restricted Mode: No <details> <summary>System Info</summary> |Item|Value| |---|---| |CPUs|Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz (12 x 2600)| |GPU Status|2d_canvas: enabled<br>canvas_oop_rasterization: disabled_off<br>direct_rendering_display_compositor: disabled_off_ok<br>gpu_compositing: enabled<br>metal: disabled_off<br>multiple_raster_threads: enabled_on<br>oop_rasterization: enabled<br>opengl: enabled_on<br>rasterization: enabled<br>raw_draw: disabled_off_ok<br>skia_renderer: enabled_on<br>video_decode: enabled<br>video_encode: enabled<br>webgl: enabled<br>webgl2: enabled| |Load (avg)|5, 4, 4| |Memory (System)|16.00GB (0.0…