Migrate to pytorch_sphinx_theme2

[svekars]

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[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/14122

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❌ 8 New Failures, 2 Cancelled Jobs, 4 Unrelated Failures

As of commit fe206ba with merge base 8496f27 ():

NEW FAILURES - The following jobs have failed:

• pull / android / run-emulator (gh)
  The process '/usr/bin/sh' failed with exit code 255
• pull / test-moshi-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 300545d56fe2d9b6e5976b480d11b4917a4ff49be59ec84ee69ad9e97719e552 /exec failed with exit code 1
• 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 (ic4) / 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 (resnet50, 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 (vit, xnnpack-quantization-delegation) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 139
• trunk / unittest-release / macos / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 5

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

• pull / test-samsung-models-linux / linux-job (gh)
• pull / test-setup-linux-gcc / linux-job (gh)

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

• pull / test-openvino-linux / linux-job (gh) (similar failure)
  ##[error]The operation was canceled.

BROKEN TRUNK - The following jobs failed but was present on the merge base:

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

• docker-builds / docker-build (linux.2xlarge, executorch-ubuntu-22.04-gcc9) (gh) (trunk failure)
• pull / test-binary-size-linux-gcc / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• trunk / test-models-macos-coreml (mv2) / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 139

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