skip and log invalid k8s watch events (#2099)

Co-authored-by: Ivan Zubenko <ivan.zubenko@angloamerican.com>

platform_api/orchestrator/kube_client.py

@@ -2073,7 +2073,14 @@ async def _watch(
             if response.status == 410:
                 raise ResourceGoneException
             async for line in response.content:
-                payload = json.loads(line)
+                try:
+                    payload = json.loads(line)
+                except ValueError:
+                    logger.warning("received invalid watch event object: %s", line)
+                    continue
+                if "type" not in payload or "object" not in payload:
+                    logger.warning("received invalid watch event object: %s", line)
+                    continue
                 if WatchEvent.is_error(payload):
                     self._check_status_payload(payload["object"])
                 if WatchBookmarkEvent.is_bookmark(payload):