disable the out variants in test_cumprod test for inductor (#88328)
`out=` variants aren't supported by autograd and it's not a must fix, so disabling the test (https://github.com/pytorch/torchdynamo/issues/1798) for now.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/88328
Approved by: https://github.com/desertfire
