Source transform for HF RoPE in static attention

[sxu]

Summary: LLama style RoPE shuffles/unshuffles the embedding dimension which is not as efficient as HF style RoPE. Add a source transform on static attention so HF style can be used.

Differential Revision: D78353775

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❌ 1 New Failure

As of commit 463f369 with merge base a8070ec ():

NEW FAILURE - The following job has failed:

• pull / test-eval_llama-mmlu-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 79e2c971839f6ac796c9df22e46087a58a93d5cbb8a817ad72a050cfe6035446 /exec failed with exit code 1

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This pull request was exported from Phabricator. Differential Revision: D78353775

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This pull request was exported from Phabricator. Differential Revision: D78353775