Extract _lora_call into a shared free function in lora.py (#20306)

[derekdixu]

Summary:

Both MultimodalTransformer (transformer.py) and StaticAttention (static_attention.py) had identical _lora_call methods. Extracted the logic into a module-level lora_call() function in lora.py and updated both consumers to import and call it directly.

Reviewed By: billmguo

Differential Revision: D108757232

Signed-off-by: Di Xu dixu@meta.com

[pytorch-bot]

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❌ 2 New Failures, 30 Pending, 2 Unclassified Failures

As of commit dcfea58 with merge base ef5c8a7 ():

NEW FAILURES - The following jobs have failed:

• Cadence Build & Test / hifi-build / hifi4 (gh)
  Input required and not supplied: aws-region
• Cadence Build & Test / vision-build / vision (gh)
  Input required and not supplied: aws-region

UNCLASSIFIED FAILURES - DrCI could not classify the following jobs because the workflow did not run on the merge base. The failures may be pre-existing on trunk or introduced by this PR:

• Build Aarch64 Linux Wheels / pytorch/executorch / build-wheel-py3_10-cpu-aarch64 (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  /__w/executorch/executorch/pytorch/executorch/backends/apple/coreml/runtime/inmemoryfs/inmemory_filesystem.cpp:722:48: error: ‘inmemoryfs::InMemoryFileSystem::InMemoryNode::Kind’ has not been declared
• Build Aarch64 Linux Wheels / pytorch/executorch / upload / upload-wheel-py3_10-cpu-aarch64 (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  Unable to download artifact(s): Artifact not found for name: pytorch_executorch__3.10_cpu_aarch64

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[meta-codesync]

@derekdixu has exported this pull request. If you are a Meta employee, you can view the originating Diff in D108757232.

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