Arm backend: Integrate exir to Tosa pass

[SaoirseARM]

Summary

Adds pass to arm pass manager to integrate exir_to_dialect_pass.
Also adds TOSA dialect activation node visitors.

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218 @mansnils @Sebastian-Larsson @robell @rascani

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/20281

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❌ 5 New Failures

As of commit c225a25 with merge base e88fd04 ():

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
• pull / test-qnn-models-linux (mv2) / linux-job (gh)
  RuntimeError: Command docker exec -t c7f2698c1a140e1b36f6c8b37c9e23625881f64e3c98b9a2a47c49b6af0201fd /exec failed with exit code 92
• pull / test-voxtral-realtime-xnnpack-linux / linux-job (gh)
  RuntimeError: Command docker exec -t eb199be7ed922bcd807aa1ab6c9dc8c64139413c7b06632b10d0fa1d0c8836fe /exec failed with exit code 1
• pull / unittest-editable / linux / linux-job (gh)
  examples/models/test/test_export.py::ExportTest::test_efficient_sam_export_to_executorch

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[SaoirseARM]

@pytorchbot label 'partner: arm'

[SaoirseARM]

@pytorchbot label ciflow/trunk

[SaoirseARM]

@pytorchbot label "release notes: arm"

[zingo]

OK to merge as long as buck2 files are handled for the added files.

[SaoirseARM]

No more buck2 changes required after: c225a25. test failures look unrelated.