find_clump not working on octree-AMR datasets

[PaoloSuin]

This is perhaps related to #2610, since other issues with volume rendering (#1212 (comment) )

    ad = gas.all_data()
    master_clump = Clump(ad, ("gas", "density"))
    c_min = ad["gas", "density"].min()
    c_max = ad["gas", "density"].max()
    step = 2.0
    find_clumps(master_clump, c_min, c_max, step)

leads to

Traceback (most recent call last):
  File "/home/psuin/.local/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 3378, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-1-e086ea99c2eb>", line 1, in <module>
    find_clumps(master_clump, c_min, c_max, step)
  File "/home/psuin/.local/lib/python3.10/site-packages/yt/data_objects/level_sets/clump_handling.py", line 416, in find_clumps
    clump.find_children(min_val, max_val=max_val)
  File "/home/psuin/.local/lib/python3.10/site-packages/yt/data_objects/level_sets/clump_handling.py", line 152, in find_children
    nj, cids = identify_contours(self.data, self.field, min_val, max_val)
  File "/home/psuin/.local/lib/python3.10/site-packages/yt/data_objects/level_sets/contour_finder.py", line 23, in identify_contours
    for (g, node, (sl, dims, gi)) in data_source.tiles.slice_traverse():
  File "/home/psuin/.local/lib/python3.10/site-packages/yt/data_objects/data_containers.py", line 1508, in tiles
    self._tree = AMRKDTree(self.ds, data_source=self)
  File "/home/psuin/.local/lib/python3.10/site-packages/yt/utilities/amr_kdtree/amr_kdtree.py", line 176, in __init__
    raise RuntimeError(
RuntimeError: AMRKDTree does not support particle or octree-based data.

Is there any solution or workaround?

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