[Python][GPU] Remove cuda numba interop test skip once cuda-numba is released

[raulcd]

Describe the enhancement requested

As discussed here:
#48259 (comment)

We added a skip to the python/pyarrow/tests/test_cuda_numba_interop.py tests due to:

pytest.skip("Numba integration tests broken by Numba API changes, see GH-48265",
            allow_module_level=True)

This requires the following to be fixed:

• [Python][GPU] CI environment not installing Numba-CUDA correctly #47371

We decided to merge with the skip because we are going to lose the cuda runners that were previously provided by voltron data and we won't be able to test once the fix is in place.

Once we have runners away and the above issue is fixed we should remove the skip on the tests.

Component(s)

GPU, Python

[gmarkall]

A PR attempting to fix this is at #48284.

[pitrou]

Done in #48284