create_fake_backend: tool for creating fake backend files and settings

[1ucian0]

This script creates the file for setting a new fake backend, including inserting the lines around and the release note.

python ./tools/create_fake_backend.py --hub <redacted> oslo ibm_oslo
python ./tools/update_fake_backends.py --hub <redacted> ibm_oslo

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[coveralls]

Pull Request Test Coverage Report for Build 3083784995

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 40 unchanged lines in 8 files lost coverage.
• Overall coverage decreased (-0.006%) to 84.394%

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Files with Coverage Reduction	New Missed Lines	%
qiskit/compiler/transpiler.py	1	89.71%
qiskit/providers/fake_provider/fake_provider.py	1	70.91%
qiskit/transpiler/passes/synthesis/unitary_synthesis.py	1	93.33%
qiskit/extensions/quantum_initializer/squ.py	2	79.78%
qiskit/utils/optionals.py	2	94.74%
qiskit/circuit/init.py	5	83.33%
qiskit/circuit/library/phase_oracle.py	5	84.85%
qiskit/visualization/circuit/_utils.py	23	93.52%

Totals
Change from base Build 3064945915:	-0.006%
Covered Lines:	59259
Relevant Lines:	70217

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💛 - Coveralls

[HuangJunye]

This is really nice and handy! I left a few comments.

In addition, I think it would be great if this script also runs the update_fake_backends.py script so just one command python ./tools/create_fake_backend.py --hub <redacted> ibm_oslo to create the files and pull the system snapshots.

[HuangJunye]

Can we pass in only the system name as argument instead of both backend name and system name? You can stripe off the leading ibm_ or ibmq_ from system name to get the backend name
python ./tools/create_fake_backend.py --hub <...> ibm_oslo instead of
python ./tools/create_fake_backend.py --hub <...> oslo ibm_oslo

[HuangJunye]

I think there was a discussion that we don't need to add BackendV1 fake backend any more. Ideally I would like to have FakeVigo to be a backend that has the latest backend version, FakeVigoV1 and FakeVigoV2 to have explicit backend version name in the class and FakeVigo is simply FakeVigoV2 and it will be FakeVigoV3 if there is a new backend version.

But at the moment we don't have this distinction. Fake backends without explicit version like FakeVigo are all V1 backends. So I would suggest to add V2 for all the backends that are created using this script to avoid confusion. What do you think?

[HuangJunye]

One last thing. Can you also add documentation of how to run the script in the same file?

[1ucian0]

This probably should be in the provider, once #9553 gets addressed .

[1ucian0]

With moving the IBM's fake providers to qiskit-ibm-runtime, moving this PR there Qiskit/qiskit-ibm-runtime#1263