Update deprecated command in azure script (#6056)

apply-rg_2.sh uses 'az group deployment' command but the command is
deprecated like the following warning message:

"This command is implicitly deprecated because command group
 'group deployment' is deprecated and will be removed in a future release.
 Use 'deployment group' instead."

This updates these deprecated commands.

FYI: The command has been deprecated since [1] on azure-cli side.
[1]: 991cb7cc7c (diff-2057bbb8441166e4910b34b09d22b58cR222)

contrib/azurerm/apply-rg_2.sh

@@ -11,9 +11,9 @@ fi
 
 ansible-playbook generate-templates.yml
 
-az group deployment create --template-file ./.generated/network.json -g $AZURE_RESOURCE_GROUP
-az group deployment create --template-file ./.generated/storage.json -g $AZURE_RESOURCE_GROUP
-az group deployment create --template-file ./.generated/availability-sets.json -g $AZURE_RESOURCE_GROUP
-az group deployment create --template-file ./.generated/bastion.json -g $AZURE_RESOURCE_GROUP
-az group deployment create --template-file ./.generated/masters.json -g $AZURE_RESOURCE_GROUP
-az group deployment create --template-file ./.generated/minions.json -g $AZURE_RESOURCE_GROUP
+az deployment group create --template-file ./.generated/network.json -g $AZURE_RESOURCE_GROUP
+az deployment group create --template-file ./.generated/storage.json -g $AZURE_RESOURCE_GROUP
+az deployment group create --template-file ./.generated/availability-sets.json -g $AZURE_RESOURCE_GROUP
+az deployment group create --template-file ./.generated/bastion.json -g $AZURE_RESOURCE_GROUP
+az deployment group create --template-file ./.generated/masters.json -g $AZURE_RESOURCE_GROUP
+az deployment group create --template-file ./.generated/minions.json -g $AZURE_RESOURCE_GROUP