Arm backend: Add event profiling to VGF backend

[wwwind]

Add event profiling to VGF backend.

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

[pytorch-bot]

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❌ 1 New Failure

As of commit af840eb with merge base 1feb56c ():

NEW FAILURE - The following job has failed:

• pull / test-multimodal-linux (gemma3-4b) / linux-job (gh)
  RuntimeError: Command docker exec -t b8060c76c3d5b5558e68d2b65d8d58170dbac4eef4f1f04e8765ab2a73196905 /exec failed with exit code 139

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