move nbgv into tool restore

.config/dotnet-tools.json

@@ -0,0 +1,12 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "nbgv": {
+      "version": "3.4.194",
+      "commands": [
+        "nbgv"
+      ]
+    }
+  }
+}

azure-pipelines.yml

@@ -22,10 +22,14 @@ stages:
       inputs:
         command: custom
         custom: tool
-        arguments: install --tool-path . nbgv
-      displayName: Install NBGV tool
+        arguments: restore
+      displayName: Install NBGV and other dotnet tools
 
-    - script: nbgv cloud
+    - task: DotNetCoreCLI@2  
+      inputs:
+        command: custom
+        custom: nbgv
+        arguments: cloud
       displayName: Set Version
 
     - task: NuGetToolInstaller@1