Extend deprecation of QuantumCircuit.duration and DAGCircuit.duration

[mtreinish]

Summary

Since we're unlikely to be able to include these removals as part of Qiskit 2.0.0 given the dependencies on them and that the removals are not critical for any work we have in the 2.x series this commit opts to just update the deprecation message to say the removal will occur in Qiskit 3.0.0 not 2.0.0 like was originally planned.

Details and comments

[qiskit-bot]

One or more of the following people are relevant to this code:

• @Qiskit/terra-core

[coveralls]

Pull Request Test Coverage Report for Build 13676091912

Details

• 4 of 4 (100.0%) changed or added relevant lines in 2 files are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage remained the same at 87.154%

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Files with Coverage Reduction	New Missed Lines	%
crates/qasm2/src/lex.rs	3	91.98%

Totals
Change from base Build 13675663441:	0.0%
Covered Lines:	76599
Relevant Lines:	87889

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💛 - Coveralls

[alexanderivrii]

LGTM! Just one minor question about the release notes: we are suggesting to use :meth:.QuantumCircuit.estimate_duration for DAGCircuits as well?

[mtreinish]

LGTM! Just one minor question about the release notes: we are suggesting to use :meth:.QuantumCircuit.estimate_duration for DAGCircuits as well?

We are as the method isn't publicly exposed for DAGCircuit we could add it because it's actually internally operating on a dag, but at the time we added estimate_duration it was only really thought of as being useful for a circuit post-transpilation. We can look at adding it to DAGCircuit in 2.1, I'll open an issue to discuss/track this.

[mtreinish]

Actually I remember now it wasn't straightforward to add it to DAGCircuit. The issue is that DAGCircuit is in the circuit crate and Target is in the accelerate crate. We need both objects for estimate_duration and I couldn't add a dependency in circuit on accelerate because accelerate depends on circuit. So I added it as a standalone function in accelerate: https://github.com/Qiskit/qiskit/blob/main/crates/accelerate/src/circuit_duration.rs and the method is added in Python. This is not trivial to do for DAGCircuit because it is all written in rust right now so I can't just add a method in Python space.