Fix torch.compile for text generation

[regisss]

What does this PR do?

Text-generation tests with torch.compile currently fail, this PR fixes this issue.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

[regisss]

@vivekgoe @hlahkar The two torch.compile tests for text generation (1x and 8x) now fail after #806. It seems reverting from has_fused_rms_norm to FusedRMSNorm is enough to fix it, let me know if that's okay for you.

[HuggingFaceDocBuilderDev]

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[vivekgoe]

@regisss has_fused_rms_norm will work with Synapse 1.15.0 release content. We need to revert this change back once 1.15.0 is available, without this there will be a performance drop for Llama-FSDP fine-tuning. FYI @libinta @hlahkar