[RecoveryServices]: add cross region restore support for East US 3 (#28476)

Co-authored-by: Raj Kamal <[email protected]>

Author: prog-rajkamal

src/RecoveryServices/RecoveryServices.Backup/Helpers/BackupUtils.cs

@@ -99,6 +99,7 @@ public class BackupUtils
             {"southwestus", "centralus"},
             {"southcentralus2", "westcentralus"},
             {"southeastus3", "westus3"},
+            {"eastus3", "westus3"},
             {"southeastus5", "centralus"},
             {"southeastus", "westus3"}
         };

src/RecoveryServices/RecoveryServices/ChangeLog.md

@@ -18,6 +18,8 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
+* Added Cross region restore support for new region - eastus3.
+
 
 ## Version 7.8.0
 * Added new optional parameter CVMOsDiskEncryptionSetId in Restore-AzRecoveryServicesBackupItem.