Add results streaming to gafferpy

[t92549]

Describe the new feature you'd like
gafferpy should be able to stream results back from the rest api, probably in bulk chunks where the user can set the size

Why do you want this feature?
If very large results are returned, this would allow gafferpy users to process the results as they come, effectively utilising the lazy iterable from Accumulo. It would mean that large results that would otherwise not fit into memory can be processed in a stream.

Additional context
The /graph/operations/execute/chunked endpoint should be used to stream results back from the rest api