Update torch pin to Sep 06, 2025

[mergennachin]

Summary:

Branch cut for PT/PT is Sep 08, so let's bring it forward just a few days before the branch cut.

Once we cut the 1.0 branch cut in ET, we will pin to 2.9 which is basically equivalent of Sep 08

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/14129

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❌ 15 New Failures, 11 Cancelled Jobs, 2 Unrelated Failures

As of commit 460ac12 with merge base dbac09c ():

NEW FAILURES - The following jobs have failed:

• pull / test-moshi-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 9796e29dfea66925ce3a3cadcf11c51f57cded698a72d88f9497fd0594ff81bc /exec failed with exit code 1
• pull / unittest / macos / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 5
• pull / unittest-editable / macos / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 5
• 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 139
• trunk / test-models-macos-coreml (dl3) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 139
• trunk / test-models-macos-coreml (emformer_transcribe) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 139
• trunk / test-models-macos-coreml (ic4) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 139
• trunk / test-models-macos-coreml (mv3) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 139
• trunk / test-models-macos-coreml (resnet50) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 139
• trunk / test-models-macos-coreml (vit) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 139
• trunk / test-models-macos-coreml (w2l) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 139
• trunk / test-models-macos-cpu (ic4, xnnpack-quantization-delegation) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 139
• trunk / test-models-macos-cpu (llama3_2_vision_encoder, portable) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 139
• trunk / test-models-macos-cpu (mobilebert, xnnpack-quantization-delegation) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 139
• trunk / test-models-macos-cpu (mv3, portable) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 139

CANCELLED JOBS - The following jobs were cancelled. Please retry:

• Build Presets / zephyr (zephyr) / build (gh)
• pull / test-binary-size-linux-gcc / linux-job (gh)
• pull / test-llava-runner-linux / linux-job (gh)
• pull / test-openvino-linux / linux-job (gh)
• pull / test-samsung-models-linux / linux-job (gh)
• pull / test-setup-linux-gcc / linux-job (gh)
• pull / unittest-arm-backend-with-no-fvp (test_pytest_ops) / linux-job (gh)
• trunk / test-arm-backend (test_pytest_ops_ethosu_fvp) / linux-job (gh)
  ##[error]The operation was canceled.
• trunk / test-demo-backend-delegation (buck2) / linux-job (gh)
  ##[error]The operation was canceled.
• trunk / test-demo-backend-delegation (cmake) / linux-job (gh)
  ##[error]The operation was canceled.
• trunk / test-selective-build-macos (cmake) / macos-job (gh)
  ##[error]The operation was canceled.

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• docker-builds / docker-build (linux.2xlarge, executorch-ubuntu-22.04-gcc9) (gh) (detected as infra flaky with no log or failing log classifier)
• docker-builds / docker-build (linux.2xlarge, executorch-ubuntu-22.04-zephyr-sdk) (gh) (detected as infra flaky with no log or failing log classifier)

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[digantdesai]

🥇

[swolchok]

Looks like this may have broken test-moshi-linux. Hard to tell because the previous PR had an infra flake. https://hud.pytorch.org/hud/pytorch/executorch/main/1?per_page=50&name_filter=moshi-linux