Avoid checking if matrix is unitary in Split2qUnitaries (#13234)

This commit fixes a small oversight in the Split2QUnitaries transpiler
pass. When it does decide to split the unitary into two single qubit
unitary gates it was creating a new UnitaryGate object. When these
UnitaryGate objects were created we weren't setting the check_input flag
to false. This meant we were spending time validating the matrix was a
unitary, but in the context the matrix is known to be unitary already,
so we don't need to spend the time doing this checking.

crates/accelerate/src/split_2q_unitaries.rs

@@ -45,8 +45,12 @@ pub fn split_2q_unitaries(
             if matches!(decomp.specialization, Specialization::IdEquiv) {
                 let k1r_arr = decomp.K1r(py);
                 let k1l_arr = decomp.K1l(py);
-                let k1r_gate = UNITARY_GATE.get_bound(py).call1((k1r_arr,))?;
-                let k1l_gate = UNITARY_GATE.get_bound(py).call1((k1l_arr,))?;
+                let k1r_gate = UNITARY_GATE
+                    .get_bound(py)
+                    .call1((k1r_arr, py.None(), false))?;
+                let k1l_gate = UNITARY_GATE
+                    .get_bound(py)
+                    .call1((k1l_arr, py.None(), false))?;
                 let insert_fn = |edge: &Wire| -> PyResult<OperationFromPython> {
                     if let Wire::Qubit(qubit) = edge {
                         if *qubit == qubits[0] {