Provide guidance or ergonomics around "fetch results" retries

[jselig-rigetti]

qc.run calls can fail due to a connection timeout when jobs are stuck in the queue for a while.
As is there's no retries to fetch results, so the execution is abandoned because the results can't be re-fetched.

You can get around this today by splitting the qc.run call into separate qc.qam.{execute,get_result} calls, but it probably makes sense to build some ergonomics in to pyquil itself to automatically retry.

Note that qcs-sdk should probably also use get_controller_job_status when awaiting a long-queued jobs, perhaps to periodically print "still queued..." so that the user knows what's going on.

job_id = qc.qam.execute(exe)

while True:
    try:
        # this can be retried on timeout - but not on 404
        result = qc.qam.get_result(job_id)
        break
    except Exception as e:
        if "tcp connect error" in str(e):
            print(f"Timeout retrieving job {job_id} result, retrying...")
            continue
        raise e
            
# use results typically --- 
print(result.get_register_map()["ro"])