Warnings in unit testing

[caleb-johnson]

Address warnings in unit testing. Some of these will become breaking changes in Qiskit 2.0

test/utils/test_layering.py::TestSlicingFunctions::test_slice_by_gate_types
  /Users/caleb/projects/repos_pub/qiskit-addon-obp/.tox/py310/lib/python3.10/site-packages/qiskit/circuit/quantumcircuit.py:3278: DeprecationWarning: The property ``qiskit.dagcircuit.dagcircuit.DAGCircuit.duration`` is deprecated as of qiskit 1.3.0. It will be removed in Qiskit 2.0.0.
    return dag_to_circuit(dag, copy_operations=False)

test/test_backpropagation.py::TestBackpropagation::test_backpropagate
test/test_backpropagation.py::TestBackpropagation::test_backpropagate
test/utils/test_layering.py::TestSlicingFunctions::test_slice_by_gate_types
test/utils/test_layering.py::TestSlicingFunctions::test_slice_by_gate_types
  /Users/caleb/projects/repos_pub/qiskit-addon-obp/.tox/py310/lib/python3.10/site-packages/qiskit/circuit/quantumcircuit.py:3278: DeprecationWarning: The property ``qiskit.dagcircuit.dagcircuit.DAGCircuit.unit`` is deprecated as of qiskit 1.3.0. It will be removed in Qiskit 2.0.0.
    return dag_to_circuit(dag, copy_operations=False)

test/test_backpropagation.py::TestBackpropagation::test_backpropagate_timeout
test/test_backpropagation.py::TestBackpropagation::test_backpropagate_timeout
test/test_backpropagation.py::TestBackpropagation::test_backpropagate_timeout
test/test_backpropagation.py::TestBackpropagation::test_backpropagate_timeout
  /Users/caleb/projects/repos_pub/qiskit-addon-obp/.tox/py310/lib/python3.10/site-packages/qiskit_addon_utils/slicing/slice_by_depth.py:56: DeprecationWarning: The property ``qiskit.dagcircuit.dagcircuit.DAGCircuit.duration`` is deprecated as of qiskit 1.3.0. It will be removed in Qiskit 2.0.0.
    slices.append(dag_to_circuit(s))

test/test_backpropagation.py::TestBackpropagation::test_backpropagate_timeout
test/test_backpropagation.py::TestBackpropagation::test_backpropagate_timeout
test/test_backpropagation.py::TestBackpropagation::test_backpropagate_timeout
test/test_backpropagation.py::TestBackpropagation::test_backpropagate_timeout
  /Users/caleb/projects/repos_pub/qiskit-addon-obp/.tox/py310/lib/python3.10/site-packages/qiskit_addon_utils/slicing/slice_by_depth.py:56: DeprecationWarning: The property ``qiskit.dagcircuit.dagcircuit.DAGCircuit.unit`` is deprecated as of qiskit 1.3.0. It will be removed in Qiskit 2.0.0.
    slices.append(dag_to_circuit(s))

test/utils/test_layering.py::TestSlicingFunctions::test_slice_by_gate_types
  /Users/caleb/projects/repos_pub/qiskit-addon-obp/.tox/py310/lib/python3.10/site-packages/qiskit/transpiler/passmanager.py:70: DeprecationWarning: The property ``qiskit.dagcircuit.dagcircuit.DAGCircuit.duration`` is deprecated as of qiskit 1.3.0. It will be removed in Qiskit 2.0.0.
    out_program = dag_to_circuit(passmanager_ir, copy_operations=False)

test/utils/test_layering.py::TestSlicingFunctions::test_slice_by_gate_types
  /Users/caleb/projects/repos_pub/qiskit-addon-obp/.tox/py310/lib/python3.10/site-packages/qiskit/transpiler/passmanager.py:70: DeprecationWarning: The property ``qiskit.dagcircuit.dagcircuit.DAGCircuit.unit`` is deprecated as of qiskit 1.3.0. It will be removed in Qiskit 2.0.0.
    out_program = dag_to_circuit(passmanager_ir, copy_operations=False)

test/utils/test_simplify.py::TestSimplify::test_simplify_parameters
  /Users/caleb/projects/repos_pub/qiskit-addon-obp/.tox/py310/lib/python3.10/site-packages/qiskit/quantum_info/operators/symplectic/sparse_pauli_op.py:213: RuntimeWarning: invalid value encountered in equal
    else (self.coeffs == other.coeffs).all()

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html