Add SimulatorOptions.set_backend method

[ikkoham]

Summary

This PR proposes the simple method to set the simulator options from backend.

Before

from qiskit.providers.fake_provider import FakeManila
from qiskit_aer.noise import NoiseModel

# Make a noise model
fake_backend = FakeManila()
noise_model = NoiseModel.from_backend(fake_backend)

# Set options to include the noise model
options = Options()
options.simulator = {
    "noise_model": noise_model,
    "basis_gates": fake_backend.configuration().basis_gates,
    "coupling_map": fake_backend.configuration().coupling_map,
    "seed_simulator": 42
}

After

from qiskit.providers.fake_provider import FakeManila
from qiskit_aer.noise import NoiseModel

# Make a noise model
fake_backend = FakeManila()

# Set options to include the noise model
options = Options()
options.simulator.set_backend(fake_backend)
options.simulator.seed_simulator = 42

I opened the PR to discuss. If this direction is ok, I'll finalize the PR.

Details and comments

Fixes #

[veenaiyuri]

Thank you for this @ikkoham. As someone involved with teaching, I want to note that simplifying code implementation as proposed in this case may seem small but does make a real difference.

[ikkoham]

Oh... There are no config file for black.

[coveralls]

Pull Request Test Coverage Report for Build 5533160393

• 14 of 15 (93.33%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.08%) to 74.181%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
qiskit_ibm_runtime/options/simulator_options.py	14	15	93.33%

Totals
Change from base Build 5520615217:	0.08%
Covered Lines:	2422
Relevant Lines:	3265

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💛 - Coveralls

[kt474]

Thanks for adding this! Mostly looks good - can you also add a release note highlighting this new method?

[ikkoham]

@kt474 Thank you very much. If you encounter any problems related to ddt in the future, please assign me.