Switch to public feed for roslyn server executables

Author: dibarbet

CONTRIBUTING.md

@@ -15,9 +15,6 @@ To run and develop the extension do the following:
 * Run `npm i`
 * Run `npm i -g gulp`
 * Run `gulp installDependencies` (this will download the various dependencies as specified by the version in the [package.json](package.json))
-  * A common error you may run into is `NU1301: Unable to load the service index for source https://devdiv.pkgs.visualstudio.com/_packaging/VS/nuget/v3/index.json`. 
-  To resolve this error, try running `dotnet restore --interactive server/ /p:MicrosoftCodeAnalysisLanguageServerVersion=version_number` with `version_number` replaced with the version number found in [package.json](package.json) inside the `defaults` section under the `roslyn` key.
-  If this does not work, install [azure artifacts nuget credential provider](https://github.com/microsoft/artifacts-credprovider#installation-on-windows) then rerun the previous command.
 * Open in Visual Studio Code (`code .`)
 * _Optional:_ run `npm run watch`, make code changes
 * Press <kbd>F5</kbd> to debug
@@ -41,7 +38,7 @@ VSIXs can be created using the gulp command `gulp vsix:release:package`.  This w
 ## Updating the Roslyn server version
 
 To update the version of the roslyn server used by the extension do the following:
-1.  Find the the Roslyn signed build you want from [here](https://dnceng.visualstudio.com/internal/_build?definitionId=327&branchFilter=246637%2C246637).  Typically the latest successful build is fine.
+1.  Find the the Roslyn signed build you want from [here](https://dnceng.visualstudio.com/internal/_build?definitionId=327&_a=summary).  Typically the latest successful build of main is fine.
 2.  In the official build stage, look for the `Publish Language Server Executables` step.  In there you will see it publishing the `Microsoft.CodeAnalysis.LanguageServer` package with some version, e.g. `4.6.0-3.23158.4`.  Take note of that version number.
 3.  In the [package.json](package.json) inside the `defaults` section update the `roslyn` key to point to the version number you found above in step 2.
 4.  Build and test the change (make sure to run `gulp installDependencies` to get the new version!).  If everything looks good, submit a PR.

package-lock.json

@@ -35,7 +35,7 @@
     }
   },
   "defaults": {
-    "roslyn": "4.7.0-2.23276.6",
+    "roslyn": "4.7.0-3.23312.11",
     "omniSharp": "1.39.6",
     "razor": "7.0.0-preview.23275.2"
   },

package.json

@@ -3,7 +3,7 @@
 <configuration>
   <packageSources>
     <clear />
-    <add key="VS" value="https://devdiv.pkgs.visualstudio.com/_packaging/VS/nuget/v3/index.json" />
+    <add key="vs-impl" value="https://pkgs.dev.azure.com/azure-public/vside/_packaging/vs-impl/nuget/v3/index.json" />
     <add key="dotnet-public" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json" />
   </packageSources>
   <disabledPackageSources>