self-hosted-runners: mark all dependent resources for deletion

The network security group and the virtual network resources are
currently left behind when deleting the VM. Let's mark them up for
deletion together with the VM that depends on these resources.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

azure-self-hosted-runners/azure-arm-template.json

@@ -151,6 +151,7 @@
             "apiVersion": "2019-02-01",
             "location": "[parameters('location')]",
             "properties": {
+                "deleteOption": "[parameters('nicDeleteOption')]",
                 "securityRules": "[parameters('networkSecurityGroupRules')]"
             }
         },
@@ -160,6 +161,7 @@
             "apiVersion": "2020-11-01",
             "location": "[parameters('location')]",
             "properties": {
+                "deleteOption": "[parameters('nicDeleteOption')]",
                 "addressSpace": {
                     "addressPrefixes": "[parameters('addressPrefixes')]"
                 },