[refactor] Change JettyHttpClient#sendAsync method to not read full response in memory

[manusa]

Is your enhancement related to a problem? Please describe

Currently, the JettyHttpClient#sendAsync method reads the response completely in-memory before completing the future, even for streaming return types (Readable or InputStream).

Describe the solution you'd like

Provide alternative response listener implementation for InputStream and Readable so that the future is complete as soon as the response is received and we pipe the packets as an InputStream.

Describe alternatives you've considered

No response

Additional context

No response

[shawkins]

ExecWatchInputStream can be adapted for use with http logic as well.