Switch to using black for code formatting

[manoelmarques]

Summary

Follows the changes made in Qiskit/qiskit#6361

Details and comments

[woodsp-ibm]

It seems fine - has some weird alterations like

        eigenstate_result.aux_operator_eigenvalues = raw_es_result.aux_operator_eigenvalues

to

        eigenstate_result.aux_operator_eigenvalues = (
            raw_es_result.aux_operator_eigenvalues
        )

that seemed to fit on the one line fine; but aside from these oddities in general things look ok

[mtreinish]

It seems fine - has some weird alterations like

        eigenstate_result.aux_operator_eigenvalues = raw_es_result.aux_operator_eigenvalues

to

        eigenstate_result.aux_operator_eigenvalues = (
            raw_es_result.aux_operator_eigenvalues
        )

that seemed to fit on the one line fine; but aside from these oddities in general things look ok

Yeah the black style choices can be a bit weird looking at times (I'm generally not a fan of it's style and probably wouldn't personally format code like it does). But the real advantage it offers is just removing code style and formatting as something humans need to worry about. It makes code formatting a simple and fast one line command prior you run prior to committing. So it just takes any questions out of the process.