Patch for salt-cloud digitalocean integration to support setting VPC for private networking

digitalocean_saltcloud_vpc.patch

--- /usr/lib/python3/dist-packages/salt/cloud/clouds/digitalocean.py	2020-09-07 11:02:31.000000000 +1200
+++ /usr/lib/python3/dist-packages/salt/cloud/clouds/digitalocean_new.py	2020-09-07 11:04:47.000000000 +1200
@@ -357,6 +357,11 @@
         if not isinstance(private_networking, bool):
             raise SaltCloudConfigError("'private_networking' should be a boolean value.")
         kwargs['private_networking'] = private_networking
+        vpc_uuid = config.get_cloud_config_value(
+            "vpc_uuid", vm_, __opts__, search_global=False, default=None,
+        )
+        if vpc_uuid is not None:
+            kwargs["vpc_uuid"] = vpc_uuid
 
     if not private_networking and ssh_interface == 'private':
         raise SaltCloudConfigError(