Add SamplerV2 support

[coruscating]

Now that SamplerV2 has been released and supports single-shot counts data, we can theoretically run all our count-based experiments using the sampler primitive. The work can be broken into these PRs:

• Refactor circuits() in older experiments to use parameterized_circuits() following @nkanazawa1989's work in Stark experiments
• Save parameters and circuit metadata in experiment metadata
• Support SamplerV2 backends in experiment.run()
• Refactor curve analysis to parse the new format using metadata