Sending show plan graph to ADS on Result Set updated event (#1300)

* Sending showplan graph over json rpc in Result updated event
Translating showplan graph into simple objects to be sent over JSON RPC

* Revert "Sending showplan graph over json rpc in Result updated event"

This reverts commit 2d63a625fd200d057bf6093e233f05dea440347c.

* Added string for localization

* Sending showplan graph over json rpc in Result updated event
Translating showplan graph into simple objects to be sent over JSON RPC

* Refactoring class

* Removing test warning

* Removing unused imports
Adding copyright

* Removing unused prop

* removing formatted string out .strings file

* Formatting files
Adding Errors in show plan graph

* Adding a separate event for execution plan

* Now sending mulitple graphs when a batch has more than one query.

src/Microsoft.SqlTools.ServiceLayer/Localization/sr.xlf

@@ -5631,6 +5631,20 @@
         <note>.
  Parameters: 0 - path (string), 1 - editType (string) </note>
       </trans-unit>
+      <trans-unit id="OperatorDisplayCost">
+        <source>{0:0.#######} ({1}%)</source>
+        <target state="new">{0:0.#######} ({1}%)</target>
+        <note> display string for the operator cost property - 0.###### - is the float number format specifier.
+ Parameters: 0 - cost (double), 1 - percentage (int) </note>
+      </trans-unit>
+      <trans-unit id="ActualOfEstimated">
+        <source>{0} of
+{1} ({2}%)</source>
+        <target state="new">{0} of
+{1} ({2}%)</target>
+        <note>.
+ Parameters: 0 - actual (string), 1 - estimated (string), 2 - percent (decimal) </note>
+      </trans-unit>
     </body>
   </file>
 </xliff>