[Python] Add a general purpose cython trampolining utility #28913
Description
Currently, invoking python from C++ requires a lot of boilerplate. For example, see any class named /\w+Vtable/ which holds a bundle of function pointers and a single OwnedRef to a python object accessed by those functions. This is unnecessarily baroque for adding simple callbacks and we could instead have a general purpose utility similar to std::bind which can bring a python object into closure.
Reporter: Ben Kietzman / @bkietz
Assignee: Ben Kietzman / @bkietz
PRs and other links:
Note: This issue was originally created as ARROW-13226. Please see the migration documentation for further details.