Update Pasqal Tutorial Documentation (#5316)
Update Pasqal Tutorial Documentation (#5316)

* Update Pasqal Tutorial Documentation

- Update Pasqal documentation to use device validation
rather than devices attached to circuits.
- Clean up code so that repeated executions do not fail noise
model or validation.
- Clear output.
- Add a few code comments.
quantumlib/Cirq,quantumlib/Cirq,quantumlib/Cirq,quantumlib/Cirq,quantumlib/Cirq