Updates to SamplerV2 support

[wshanks]

• Patch ExperimentData.completion_times to handle Job.time_per_step not
  existing
• Pass noise_model run option through to Sampler
• Add support for level 1 data to Sampler execution
• Handle case where the Sampler strips circuit metadata from results
• Mark some test backends as simulators so the sampler does not try to
  validate circuits
• Change some tests to be more consistent about shots since the Sampler
  can not handle the requested number of shots differing from the shots
  in the actual results.
• Support level 2 bitstrings in MockIQBackend
• Fix PulseBackend returning data as numpy array instead of a list
• Pass run options through to backend in T2HahnBackend
• Do not set block_for_results timeout to 0 when TEST_TIMEOUT is 0
  (TEST_TIMEOUT=0 indicates no timeout, not immediate timeout).
• Monkey-patch BackendSamplerV2's run circuits function in the tests so
  that it does not strip circuit metadata that the test backends need to
  generate results.
• Fix inconsistency between bitstring format and number of qubits in
  restless test.
• Handle case where job class does not have error_message

[wshanks]

This is not enough to get the tests to pass. Additional changes are needed to qiskit-ibm-runtime and qiskit in order to support level 1 results in BackendSamplerV2 and to pass a noise model run option through an Aer backend with BackendSamplerV2.