Catch JsonDecodeException and raise exception with response content

[dirkkul]

Catches JsonDecode errors, raises a custom exception ResponseCannotBeDecodedException that contains the response.

Stack trace will look like this

            except JSONDecodeError:
>               raise ResponseCannotBeDecodedException(location, response)
E               weaviate.exceptions.ResponseCannotBeDecodedException: Cannot decode response from weaviate <Response [200]> with content b'JsonCannotParseThis' for request from Get shards' status

where JsonCannotParseThis was the response that is not valid Json