Backup/Restore Managed Instance (#1428)

* Enabled backup to and restore from URL

* Created RPC, but when process tries to load Microsoft.Azure.Storage.Blob.dll, it crashes

* Added create shared access token

* Code refactor

* Minor changes

* Changed RPC path

* Moved createSas RPC to the newly created BlobService, fixed PR comments

* Added sas expiration date parameter to the RPC

* Added copyright headers

* Removed ConnectionInstance property from BlobService

* Removed unhelpful comment

* Removed unused using statements

* Changed copy/paste comments

* Disposable objects fix

* Small formatting fix

* Changed backup to/restore from url supported device types

* Added backup to url integration test

* Created restore integration test. Test are now getting azure blob params from env variables instead of file.

* Culture invariant epiration date param, fixed comment, and typo

* Updated headers

* PR comments fix

* Changed supported device type logic

* string localization fix

* String formatting fix

* build failure fix

* Typo

* Updated supported restore device types

src/Microsoft.SqlTools.ServiceLayer/DisasterRecovery/Contracts/RestoreRequestParams.cs

@@ -51,6 +51,18 @@ namespace Microsoft.SqlTools.ServiceLayer.DisasterRecovery.Contracts
             }
         }
 
+        internal int DeviceType 
+        {
+            get
+            {
+                return GetOptionValue<int>(RestoreOptionsHelper.DeviceType);
+            }
+            set
+            {
+                SetOptionValue(RestoreOptionsHelper.DeviceType, value);
+            }
+        }
+
         /// <summary>
         /// Target Database name to restore to
         /// </summary>