[aot_autograd][functional_rng] Change calling convention (#102344)
Key change - seed, offset are the last 2 args in both the fwd and bwd graphs
Reason - The cudagraphs implementation in inductor currently relies on very simple ordering guarantees i.e. first n inputs are static for both fwd and bwd graphs. In the current implementation of functionalization of rng ops, this assumption is broken because the first 2 inputs are seed, offset.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/102344
Approved by: https://github.com/eellison
