Update torch.export tutorial for 2.2

[williamwen42]

Copy over the nightly tutorial for the 2.2 release, since there were API changes since 2.1.

Will fix #2707

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/tutorials/2709

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✅ You can merge normally! (1 Unrelated Failure)

As of commit 19cfb50 with merge base 0f6166b ():

BROKEN TRUNK - The following job failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

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[svekars]

Thank you for fixing the torch.export tutorial, Will! Can also please remove this entry to enable the tutorial and run it.

[angelayi]

thanks william!!

[zhxchen17]

looks good :)