text: Title: Address new deprecations in SciPy 1.12.0.dev0
  Body: Our nightly test job is doing its job and flagging pending deprecation warnings: https://github.com/scikit-image/scikit-image/actions/runs/5485938623/jobs/9995372984#step:5:3983
  
  ```
  FAILED segmentation/tests/test_random_walker.py::test_2d_cg[float16] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_2d_cg[float32] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_2d_cg[float64] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_2d_cg_mg[float16] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_2d_cg_mg[float32] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_2d_cg_mg[float64] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_types - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_3d[float32] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_3d[float64] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_3d_inactive - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_multispectral_2d[float32-0] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_multispectral_2d[float32-1] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_multispectral_2d[float32--1] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_multispectral_2d[float64-0] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_multispectral_2d[float64-1] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_multispectral_2d[float64--1] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_multispectral_3d[float32] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_multispectral_3d[float64] - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_spacing_0 - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_spacing_1 - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_isolated_seeds - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_isolated_area - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  FAILED segmentation/tests/test_random_walker.py::test_prob_tol - ValueError: Unexpected warning: 'scipy.sparse.linalg.cg' keyword argument 'tol' is deprecated in favor of 'rtol' and will be removed in SciPy v.1.14.0. Until then, if set, it will override 'rtol'.
  ```
  
  Don't have time right to look into it right now. 