Feature: Allow user to dispatch benchmark on list of machines

[vprusso]

Right now, when we dispatch a job, we dispatch a single benchmark to a single device:

python metriq_gym/run.py dispatch metriq_gym/schemas/examples/quantum_volume.example.json --provider ibm --device ibm_strasbourg 

We could support dispatching a single benchmark to a set of devices. For instance

python metriq_gym/run.py dispatch metriq_gym/schemas/examples/quantum_volume.example.json --provider ibm --device [ibm_strasbourg, ibm_kyiv, ibm_brussels]

Or even something like

python metriq_gym/run.py dispatch metriq_gym/schemas/examples/quantum_volume.example.json --provider [ibm, aws] --device [ibm_strasbourg, arn:aws:braket:us-west-1::device/qpu/rigetti/Ankaa-3]

We would want to be careful that we match the correct provider to the corresponding device (as there could potentially be some ambiguity in what provider is mapped to what device).

[cosenal]

This has a very good value with enforcing that exactly the same benchmark (with the same parameters) is run across different devices (that is, same input json)

Perhaps instead of the third pattern, we want to support one that is easier to parse, that is,

... --provider ibm --device [ibm_strasbourg, ibm_kyiv] --provider aws --device arn:aws:braket:us-west-1::device/qpu/rigetti/Ankaa-3