Migrate iot cloud module to mashumaro (#1282)

Breaking change as the CloudInfo interface is changing to snake case for
consistency with the rest of the library.

tests/fakeprotocol_iot.py

@@ -125,6 +125,7 @@ CLOUD_MODULE = {
         "username": "",
         "server": "devs.tplinkcloud.com",
         "binded": 0,
+        "err_code": 0,
         "cld_connection": 0,
         "illegalType": -1,
         "stopConnect": -1,

tests/iot/modules/test_cloud.py

@@ -0,0 +1,13 @@
+from kasa import Device, Module
+
+from ...device_fixtures import device_iot
+
+
+@device_iot
+def test_cloud(dev: Device):
+    cloud = dev.modules.get(Module.IotCloud)
+    assert cloud
+    info = cloud.info
+    assert info
+    assert isinstance(info.provisioned, int)
+    assert cloud.is_connected == bool(info.cloud_connected)