[Internal] Query: Adds support of __sys_rid to order by query result (#3271)

* order by query result to support __sys_rid

* update unit tests

Co-authored-by: Matias Quaranta <ealsur@users.noreply.github.com>

Author: PaulCheng

Microsoft.Azure.Cosmos/src/Query/Core/Pipeline/CrossPartition/OrderBy/OrderByQueryResult.cs

@@ -50,14 +50,18 @@ public string Rid
         {
             get
             {
+                // cassandra row uses __sys_rid as opposed to _rid
                 if (!this.cosmosObject.TryGetValue("_rid", out CosmosElement cosmosElement))
                 {
-                    throw new InvalidOperationException($"Underlying object does not have an '_rid' field.");
+                    if (!this.cosmosObject.TryGetValue("__sys_rid", out cosmosElement))
+                    {
+                        throw new InvalidOperationException($"Underlying object does not have an '_rid' or '__sys_rid' field.");
+                    }
                 }
 
                 if (!(cosmosElement is CosmosString cosmosString))
                 {
-                    throw new InvalidOperationException($"'_rid' field was not a string.");
+                    throw new InvalidOperationException($"'_rid' or '__sys_rid' field was not a string.");
                 }
 
                 return cosmosString.Value;

Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/LinqGeneralBaselineTests.TestThenByTranslation.xml

@@ -388,7 +388,7 @@ FROM (
         JOIN c0 IN root["Children"]) AS v1) AS r1 
         ORDER BY r1["FamilyId"] ASC, r1["FamilyNumber"] ASC
 ]]></SqlQuery>
-      <ErrorMessage><![CDATA[Underlying object does not have an '_rid' field.]]></ErrorMessage>
+      <ErrorMessage><![CDATA[Underlying object does not have an '_rid' or '__sys_rid' field.]]></ErrorMessage>
     </Output>
   </Result>
   <Result>
@@ -435,7 +435,7 @@ FROM (
         WHERE (p0["GivenName"]["Length"] > 5)) AS v0) AS r0 
         ORDER BY r0["FamilyId"] ASC, r0["FamilyNumber"] ASC
 ]]></SqlQuery>
-      <ErrorMessage><![CDATA[Underlying object does not have an '_rid' field.]]></ErrorMessage>
+      <ErrorMessage><![CDATA[Underlying object does not have an '_rid' or '__sys_rid' field.]]></ErrorMessage>
     </Output>
   </Result>
   <Result>