Bugfix for missing qubit property (backport #11880)

[mergify]

This is an automatic backport of pull request #11880 done by Mergify.

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[coveralls]

Pull Request Test Coverage Report for Build 8104552142

Details

• 5 of 7 (71.43%) changed or added relevant lines in 1 file are covered.
• 10 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.001%) to 89.289%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
qiskit/providers/backend_compat.py	5	7	71.43%

Files with Coverage Reduction	New Missed Lines	%
crates/qasm2/src/lex.rs	4	91.94%
crates/qasm2/src/parse.rs	6	97.62%

Totals
Change from base Build 8093898764:	-0.001%
Covered Lines:	58912
Relevant Lines:	65979

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💛 - Coveralls