Arm backend: Add TOSA VGF encapsulated compilation target.

[robell]

Add TOSA VGF encapsulated compilation target.

This change enables support for "vgf" files which wrap TOSA output and include memory planning for target devices which can JIT TOSA to the target ISA on-device.

• Add a VgfQuantizer (same as TOSAQuantizer)
• Add a VgfBackend and VgfPartitioner to produce TOSA wrapped in a VGF
• Requires yet to be released converter_backend

Signed-off-by: Rob Elliott [email protected]
Change-Id: I764c32c33c503eb44200e9a7d98caa8fae8a4882

Test plan

As this is a new encapsulation with a tool that's not yet released, integration with unit tests will come in a subsequent commit.

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218

[pytorch-bot]

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❌ 1 New Failure, 1 Cancelled Job

As of commit 492c940 with merge base 9efb909 ():

NEW FAILURE - The following job has failed:

• trunk / test-llama-runner-mac (fp32, coreml) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

CANCELLED JOB - The following job was cancelled. Please retry:

• trunk / test-models-macos (ic4, xnnpack-quantization-delegation) / macos-job (gh)
  ##[error]The operation was canceled.

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