Add DacFx Generate Deploy Plan Operation (#768)

* initial adding upgrade plan

* upgrade plan request from ADS works

* now data loss operations are returned

* fixes after rebasing

* refactoring to use GenerateDeployPlan instead of UpgradePlan

* improving test

* Addressing comments

* changing abstract execute to virtual

* changed GenerateDeployPlanOepration to use Execute()

* addressing comments

* simplyfing deploy options

* adding deploy options to deploy and generate script operations

src/Microsoft.SqlTools.ServiceLayer/DacFx/Contracts/GenerateDeployPlanRequest.cs

@@ -0,0 +1,37 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+using Microsoft.SqlTools.Hosting.Protocol.Contracts;
+using Microsoft.SqlTools.ServiceLayer.TaskServices;
+using Microsoft.SqlTools.ServiceLayer.Utility;
+
+namespace Microsoft.SqlTools.ServiceLayer.DacFx.Contracts
+{
+    /// <summary>
+    /// Parameters for a DacFx generate deploy plan request.
+    /// </summary>
+    public class GenerateDeployPlanParams : DacFxParams
+    {
+    }
+
+    /// <summary>
+    /// Defines the DacFx generate deploy plan request type
+    /// </summary>
+    class GenerateDeployPlanRequest
+    {
+        public static readonly RequestType<GenerateDeployPlanParams, GenerateDeployPlanRequestResult> Type =
+            RequestType<GenerateDeployPlanParams, GenerateDeployPlanRequestResult>.Create("dacfx/generateDeployPlan");
+    }
+
+    /// <summary>
+    /// Parameters returned from a generate deploy script request.
+    /// </summary>
+    public class GenerateDeployPlanRequestResult : DacFxResult
+    {
+        /// <summary>
+        /// An xml string that details the alerts and the operations for deploying the specified dacpac to the database
+        /// </summary>
+        public string Report { get; set; }
+    }
+}