[backup] Support new operations for MUA (Azure#28768)

Author: zubairabid

linter_exclusions.yml

@@ -959,6 +959,12 @@ backup vault update:
     cross_subscription_restore_state:
       rule_exclusions:
       - option_length_too_long
+    backup_storage_redundancy:
+      rule_exclusions:
+      - option_length_too_long
+    cross_region_restore_flag:
+      rule_exclusions:
+      - option_length_too_long
 backup vault create:
   parameters:
     cross_subscription_restore_state:

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

@@ -462,7 +462,7 @@
 short-summary: Sets backup related properties of the Recovery Services vault.
 examples:
   - name: Sets backup related properties of the Recovery Services vault. (autogenerated)
-    text: az backup vault backup-properties set --backup-storage-redundancy GeoRedundant --name MyRecoveryServicesVault --resource-group MyResourceGroup --subscription MySubscription
+    text: az backup vault backup-properties set --classic-alerts Enabled --name MyRecoveryServicesVault --resource-group MyResourceGroup --subscription MySubscription
     crafted: true
 """