Adding json tests

Author: leandrodamascena

aws_lambda_powertools/utilities/kafka_consumer/deserializer/json.py

@@ -49,5 +49,5 @@ def deserialize(self, data: bytes | str) -> dict:
             return json.loads(base64.b64decode(data).decode("utf-8"))
         except Exception as e:
             raise KafkaConsumerDeserializationError(
-                f"JSON deserialization error: {type(e).__name__}: {str(e)}",
+                f"Error trying to deserialize json data -  {type(e).__name__}: {str(e)}",
             ) from e