[release/0.21] set version to 0.21.0

[NicolasHug]

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[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/vision/8797

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❌ 11 New Failures, 8 Unrelated Failures

As of commit 15ab652 with merge base a9a726a ():

NEW FAILURES - The following jobs have failed:

• CMake / macos (macos-m1-stable) / macos-job (gh)
  The process '/usr/bin/git' failed with exit code 128
• CMake / windows (windows.4xlarge, cpu) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128
• Lint / python-source-and-configs / linux-job (gh)
  The process '/usr/bin/git' failed with exit code 128
• Tests / unittests-macos (3.10, macos-m1-stable) / macos-job (gh)
  The process '/usr/bin/git' failed with exit code 128
• Tests / unittests-macos (3.11, macos-m1-stable) / macos-job (gh)
  The process '/usr/bin/git' failed with exit code 128
• Tests / unittests-macos (3.12, macos-m1-stable) / macos-job (gh)
  The process '/usr/bin/git' failed with exit code 128
• Tests / unittests-macos (3.9, macos-m1-stable) / macos-job (gh)
  The process '/usr/bin/git' failed with exit code 128
• Tests / unittests-windows (3.10, windows.4xlarge, cpu) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128
• Tests / unittests-windows (3.11, windows.4xlarge, cpu) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128
• Tests / unittests-windows (3.12, windows.4xlarge, cpu) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128
• Tests / unittests-windows (3.9, windows.4xlarge, cpu) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128

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

• CMake / linux (linux.g5.4xlarge.nvidia.gpu, cuda, 11.8) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Tests / onnx / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Tests / unittests-linux (3.12, linux.12xlarge, cpu) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Tests / unittests-linux (3.9, linux.g5.4xlarge.nvidia.gpu, cuda, 11.8) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128

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

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

• Build Linux Wheels / pytorch/vision / manywheel-py3_9-rocm6_2 (gh) (trunk failure)
  Error response from daemon: manifest for pytorch/manylinux2_28-builder:rocm6.2 not found: manifest unknown: manifest unknown
• Build Linux Wheels / pytorch/vision / upload / manywheel-py3_9-rocm6_2 (gh) (trunk failure)
  Unable to find an artifact with the name: pytorch_vision__3.9_rocm6.2_x86_64
• Build Windows Wheels / pytorch/vision / upload / wheel-py3_9-xpu (gh) (trunk failure)
  Unable to find an artifact with the name: pytorch_vision__3.9_xpu_
• Tests / unittests-windows (3.9, windows.g5.4xlarge.nvidia.gpu, cuda, 11.8) / windows-job (gh) (trunk failure)
  AttributeError: '_OpNamespace' 'image' object has no attribute '_jpeg_version'

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