[jit] fix python enumerate with start kwarg (#80585)
fix https://github.com/pytorch/pytorch/issues/80150
turns out we have a unittest for this case but there is a typo so the test does not run.
With this fix both enumerate(x, start=1) and enumerate(x, 1) are supported.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/80585
Approved by: https://github.com/davidberard98
