Fix pauli_basis deprecation

[chriseclectic]

Summary

Fixes the removal of pauli_list kwarg of pauli_basis which broke existing code using the pauli_list=True future compatibility on upgrade to Qiskit Terra 0.22. This kwarg has been added back to the the function with a deprecation warning instead.

Details and comments

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[mtreinish]

LGTM, thanks for fixing this. The options shouldn't have been removed without deprecation even though it doesn't do anything after the change of the default format.

[coveralls]

Pull Request Test Coverage Report for Build 3250465537

• 3 of 4 (75.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.002%) to 84.753%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
qiskit/quantum_info/operators/symplectic/pauli_utils.py	3	4	75.0%

Totals
Change from base Build 3249813481:	0.002%
Covered Lines:	61905
Relevant Lines:	73042

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💛 - Coveralls

[ikkoham]

Thank you. My bad.

#8510
I had set the original PR to DeprecationWarning at first, but I removed it in the middle of the PR. Surely we can't delete it without DeprecationWarning. This is my mistake.