Device support for Parameter scans.

[weinbe58]

Our API supports not only multiple shots per submission but even multiple batches of program arguments. To support this we could add another API for the device object to support scanning the arguments of the function, e.g.

device.scan(kernel: ir.Method[Params, RetType], [Params(*args: Params.args,**kwargs: Params.kwargs), ...]) -> ScanTask

[jon-wurtz]

This does not seem necessary or in no way fundamental-- adding any sort of extra low level infrastructure should not be necessary. Really, this is just some sort of wrapper of

tasks = []
results = []
for param in params:
    task = device.task(kernel, **param)
    result = task.run_async()
    tasks.append(task)
    results.append(result)
# later,
data = [future.pull() for future in result]

Nothing else required. What if the user has more complicated params that don't fit a scan? It simply should not be a fundamental object.