Arm backend: Add adaptive pooling node visitors

[SaoirseARM]

Summary

• adds DecomposeAdaptiveMaxPool2dPass to pass manager

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/20220

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❌ 2 New Failures, 7 Pending, 1 Unrelated Failure

As of commit bc8bdc6 with merge base 630ddba ():

NEW FAILURES - The following jobs have failed:

• Cadence Build & Test / hifi-build / hifi4 (gh)
  Input required and not supplied: aws-region
• pull / test-voxtral-realtime-xnnpack-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 9f932aca8d5f148ec7e0e1d3bd86d5ab69988612cdb758a9069cee1aa57b0213 /exec failed with exit code 1

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• Cadence Build & Test / vision-build / vision (gh) (detected as infra flaky with no log or failing log classifier)

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[SaoirseARM]

@pytorchbot label ciflow/trunk

[SaoirseARM]

@pytorchbot label 'partner: arm'

[SaoirseARM]

@pytorchbot label "release notes: arm"

[SaoirseARM]

No buck2 changes required and failures look unrelated

[zingo]

OK to merged if tests is OK and buck2 considered/handled for the added files.