{backup} Update paired region mapping config (#31111)

Author: zubairabid

src/azure-cli/azure/cli/command_modules/backup/custom.py

@@ -91,9 +91,13 @@
     "southafricanorth": "southafricawest",
     "southafricawest": "southafricanorth",
     "southcentralus": "northcentralus",
+    "southcentralus2": "westcentralus",
     "southeastasia": "eastasia",
     "southeastus": "westus3",
+    "southeastus3": "westus3",
+    "southeastus5": "centralus",
     "southindia": "centralindia",
+    "southwestus": "centralus",
     "swedencentral": "swedensouth",
     "swedensouth": "swedencentral",
     "switzerlandnorth": "switzerlandwest",