Repository: Qiskit/qiskit

Issue:
Depreciation error for '+=' in ripple_adder
### Environment

Qiskit v1.1.0
Python 3.9.6
Sonoma 14.5


### What is happening?

Attempting to run the asv benchmark suite, specifically the ripple_adder benchmark results in depreciation error from line 216 in qiskit/test/benchmarks/utils.py

```
[[16.67%] ··· Running (ripple_adder.RippleAdderConstruction.time_build_ripple_adder--)..
[66.67%] ··· ripple_adder.RippleAdderConstruction.time_build_ripple_adder                                                                                                                                                   failed
[66.67%] ··· ====== ========
              size          
             ------ --------
               10    failed 
               50    failed 
              100    failed 
              200    failed 
              500    failed 
             ====== ========
             For parameters: 10
             Traceback (most recent call last):
               File "/Users/catherinelozano/Desktop/Qiskit_work/py-qiskit/lib/python3.9/site-packages/asv/benchmark.py", line 80, in <module>
                 main()
               File "/Users/catherinelozano/Desktop/Qiskit_work/py-qiskit/lib/python3.9/site-packages/asv/benchmark.py", line 72, in main
                 commands[mode](args)
               File "/Users/catherinelozano/Desktop/Qiskit_work/qiskit-terra-catherines/.asv/env/63b4d1e2919fcd950c89910ea84c38ee/lib/python3.9/site-packages/asv_runner/run.py", line 72, in _run
                 result = benchmark.do_run()
               File "/Users/catherinelozano/Desktop/Qiskit_work/qiskit-terra-catherines/.asv/env/63b4d1e2919fcd950c89910ea84c38ee/lib/python3.9/site-packages/asv_runner/benchmarks/_base.py", line 661, in do_run
                 return self.run(*self._current_params)
               File "/Users/catherinelozano/Desktop/Qiskit_work/qiskit-terra-catherines/.asv/env/63b4d1e2919fcd950c89910ea84c38ee/lib/python3.9/site-packages/asv_runner/benchmarks/time.py", line 165, in run
                 samples, number = self.benchmark_timing(
               File "/Users/catherinelozano/Desktop/Qiskit_work/qiskit-terra-catherines/.asv/env/63b4d1e2919fcd950c89910ea84c38ee/lib/python3.9/site-packages/asv_runner/benchmarks/time.py", line 258, in benchmark_timing
                 timing = timer.timeit(number)
               File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/timeit.py", line 177, in timeit
                 timing = self.inner(it, self.timer)
               File "<timeit-src>", line 6, in inner
               File "/Users/catherinelozano/Desktop/Qiskit_work/qiskit-terra-catherines/.asv/env/63b4d1e2919fcd950c89910ea84c38ee/lib/python3.9/site-packages/asv_runner/benchmarks/time.py", line 90, in func
                 self.func(*param)
               File "/Users/catherinelozano/Desktop/Qiskit_work/qiskit-terra-catherines/test/benchmarks/ripple_adder.py", line 29, in time_build_ripple_adder
                 build_ripple_adder_circuit(size)
               File "/Users/catherinelozano/Desktop/Qiskit_work/qiskit-terra-catherines/test/benchmarks/utils.py", line 216, in build_ripple_adder_circuit
                 qc += adder_subcircuit
             TypeError: unsupported operand type(s) for +=: 'QuantumCircuit' and 'QuantumCircuit'
```


### How can we reproduce the issue?

By running asv run^! —b ripple_adder


### What should happen?

ripple_adder benchmark tests should run and produce results 


### Any suggestions?

Replacing the addition assignment operator with ‘&=‘ in qiskit/test/benchmarks/utils.py line 216 following the deprecation of extend, +, and += for class .QuantumCircuit per release notes 0.23 (qiskit/releasenotes/notes/0.23/remove-deprecated-circuit-methods-3e4eb27c4709ba12.yaml)


Discussion:

Resolving patch:
diff --git a/qiskit/circuit/library/n_local/two_local.py b/qiskit/circuit/library/n_local/two_local.py
--- a/qiskit/circuit/library/n_local/two_local.py
+++ b/qiskit/circuit/library/n_local/two_local.py
@@ -87,7 +87,7 @@ class TwoLocal(NLocal):
 
         >>> two = TwoLocal(3, ['ry','rz'], 'cz', 'full', reps=1, insert_barriers=True)
         >>> qc = QuantumCircuit(3)
-        >>> qc += two
+        >>> qc &= two
         >>> print(qc.decompose().draw())
              ┌──────────┐┌──────────┐ ░           ░ ┌──────────┐ ┌──────────┐
         q_0: ┤ Ry(θ[0]) ├┤ Rz(θ[3]) ├─░──■──■─────░─┤ Ry(θ[6]) ├─┤ Rz(θ[9]) ├


Test patch:
diff --git a/test/benchmarks/utils.py b/test/benchmarks/utils.py
--- a/test/benchmarks/utils.py
+++ b/test/benchmarks/utils.py
@@ -213,7 +213,7 @@ def unmajority(p, a, b, c):
     qc.x(a[0])  # Set input a = 0...0001
     qc.x(b)  # Set input b = 1...1111
     # Apply the adder
-    qc += adder_subcircuit
+    qc &= adder_subcircuit
 
     # Measure the output register in the computational basis
     for j in range(n):