Fix twirling asv benchmark (#13421)

* Fix twirling asv benchmark

Since #13331 merged the nightly asv runs have been failing. This is
because the asv twirling benchmark code was updated in that PR to use
the new twirling function instead of the embedded equivalent. However,
in the PR the name of that function was renamed from twirl_circuit to
pauli_twirl_2q_gates during the development of the feature. This rename
was missed in the asv benchmark, and as nothing executes the asv code in
CI this went uncaught until the asv nightly runs. This commit fixes this
oversight and updates the function name to the correct name so that the
asv benchmarks no longer fail on import.

* Update test/benchmarks/manipulate.py

test/benchmarks/manipulate.py

@@ -17,7 +17,7 @@
 import os
 
 from qiskit import QuantumCircuit
-from qiskit.circuit import twirl_circuit
+from qiskit.circuit import pauli_twirl_2q_gates
 from qiskit.passmanager import PropertySet
 from qiskit.transpiler.preset_passmanagers import generate_preset_pass_manager
 from .utils import multi_control_circuit
@@ -38,7 +38,7 @@ def time_DTC100_twirling(self):
         """Perform Pauli-twirling on a 100Q QV
         circuit
         """
-        out = twirl_circuit(self.dtc_qc, seed=12345678942)
+        out = pauli_twirl_2q_gates(self.dtc_qc, seed=12345678942)
         return out
 
     def time_multi_control_decompose(self):