Add private NPM registry only during ADO build

As it was breaking Dependabot and local builds.

.npmrc

@@ -1,5 +1,2 @@
 ; We use Dependabot to update our packages, so we want to add without a prefix
 save-exact=true
-; We download from a private feed during the release process
-registry=https://pkgs.dev.azure.com/powershell-rel/PowerShellEditorServices/_packaging/PSESFeed/npm/registry/
-always-auth=true

.vsts-ci/templates/ci-general.yml

@@ -56,6 +56,15 @@ steps:
   inputs:
     version: 18.x
 
+- task: PowerShell@2
+  displayName: Add private NPM registry
+  inputs:
+    targetType: inline
+    pwsh: true
+    script: |
+      Add-Content .npmrc "always-auth=true"
+      Add-Content .npmrc "registry=https://pkgs.dev.azure.com/powershell-rel/PowerShellEditorServices/_packaging/PSESFeed/npm/registry/"
+
 - task: npmAuthenticate@0
   inputs:
     workingFile: $(Build.SourcesDirectory)/vscode-powershell/.npmrc

.vsts-ci/templates/publish-markets.yml

@@ -5,6 +5,15 @@ steps:
   artifact: vscode-powershell
   displayName: Download signed artifacts
 
+- task: PowerShell@2
+  displayName: Add private NPM registry
+  inputs:
+    targetType: inline
+    pwsh: true
+    script: |
+      Add-Content .npmrc "always-auth=true"
+      Add-Content .npmrc "registry=https://pkgs.dev.azure.com/powershell-rel/PowerShellEditorServices/_packaging/PSESFeed/npm/registry/"
+
 - task: npmAuthenticate@0
   inputs:
     workingFile: .npmrc