Pull submodules recursively for Benchmark app on CI

[shoumikhin]

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[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/9212

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❌ 1 New Failure, 5 Pending, 1 Unrelated Failure

As of commit 66b39a7 with merge base b8c3ee9 ():

NEW FAILURE - The following job has failed:

• apple-perf / build-benchmark-app / macos-job (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 65

BROKEN TRUNK - The following job failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / unittest-arm / linux-job (gh) (trunk failure)
  backends/arm/test/models/test_conformer.py::TestConformer::test_conformer_tosa_MI

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[shoumikhin]

@pytorchbot label "topic: not user facing"