[Python][CI] Build failure with Cython 2 #43707
Description
Describe the bug, including details regarding any error messages, version, and platform.
These failures have appeared recently on the test-conda-python-3.10-cython2 Crossbow job:
https://github.com/ursacomputing/crossbow/actions/runs/10396692805/job/28791169422#step:7:3604
Error compiling Cython file:
------------------------------------------------------------
...
"""
cdef:
c_string c_type_name = tobytes(type_name)
c_string c_vendor_name = tobytes(vendor_name)
shared_ptr[CDataType] c_type = make_shared[COpaqueType](
^
------------------------------------------------------------
pyarrow/types.pxi:5331:63: Cannot assign type 'shared_ptr[COpaqueType]' to 'shared_ptr[CDataType]'
Component(s)
Continuous Integration, Python
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