Add information about requested URL to UnexpectedResponse exception to simplify troubleshooting

[mjul]

If you specify an incorrect URL for the QdrantClient, and make a call to the server such as upsert the request will fail with an exception.

The exception does not specify which server it tried to call, only the response.

If for example, you specify the URL for a web server that is not the cluster server (e.g. one of the nodes) you can get an exception with HTTP status 404 "not found" like this when you call upsert:

qdrant_client.http.exceptions.UnexpectedResponse: Unexpected Response: 404 (Not Found)
Raw response content:
b'404 page not found\n'

To make troubleshooting configuration mistakes easier, it would be nice to include the actual URL in the exception.

Proposed Solution

The exception comes from the send function in api_client.py.

One solution would be to add an optional url field to UnexpectedResponse in exceptions.py and rewrite the UnexpectedResponse.for_response function to include the URL data from the request (the request is an optional field on response which is used to construct the exception).