Minor fix to consolidate blocks with RZZ and CZ gates

[ShellyGarion]

Summary

This is a minor fix to #13884 (so no release notes are needed, since it has not been released yet).

Details and comments

A minor fix following #13428 (comment)
when the backend has both CZ and RZZ gates

[qiskit-bot]

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

• @Qiskit/terra-core

[t-imamichi]

Thank you for fixing the issue. I confirmed that this PR fixes the issue.

from qiskit import QuantumCircuit, __version__, generate_preset_pass_manager
from qiskit_ibm_runtime import QiskitRuntimeService

print(__version__, "\n")
service = QiskitRuntimeService(name="primitives")
backend = service.backend("ibm_torino", use_fractional_gates=True)
target = backend.target

qc = QuantumCircuit(2)
qc.rzz(0.1, 0, 1)
qc.rzz(0.2, 0, 1)

pm = generate_preset_pass_manager(optimization_level=2, target=target)
tqc = pm.run(qc)
print(backend.configuration().basis_gates)
print(tqc.draw(idle_wires=False), "\n")

2.0.0.dev0+29f5468

['cz', 'id', 'rx', 'rz', 'rzz', 'sx', 'x']
global phase: π

q_0 -> 87 ──────────■──────────────────
          ┌───────┐ │ZZ(-0.3) ┌───────┐
q_1 -> 88 ┤ Rx(π) ├─■─────────┤ Rx(π) ├
          └───────┘           └───────┘

[coveralls]

Pull Request Test Coverage Report for Build 13670972956

Details

• 3 of 3 (100.0%) changed or added relevant lines in 1 file are covered.
• 4 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.03%) to 87.134%

---

Files with Coverage Reduction	New Missed Lines	%
crates/qasm2/src/lex.rs	4	92.48%

Totals
Change from base Build 13661892985:	0.03%
Covered Lines:	76459
Relevant Lines:	87749

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💛 - Coveralls

[ElePT]

LGTM