Return labels for FER2013 if possible

[NicolasHug]

Closes #8118
Closes #8368
Closes #8415

If either the fer2013.csv file or icml_face_data.csv file is present, we use one of them instead of train.csv and test.csv, and return the labels for the test data instead of None. fer2013 has precedence over the rest, then icml_face_data.csv is used, and then train/test.csv are used.

[pytorch-bot]

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❌ 12 New Failures, 4 Unrelated Failures

As of commit 6802e1c with merge base ab0b9a4 ():

NEW FAILURES - The following jobs have failed:

• Build M1 Wheels / pytorch/vision / upload / wheel-py3_8-cpu (gh)
  Unable to find any artifacts for the associated workflow
• CMake / macos (macos-m1-stable) / macos-job (gh)
  RuntimeError: operator torchvision::nms does not exist
• CMake / windows (windows.4xlarge, cpu) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128
• CMake / windows (windows.g5.4xlarge.nvidia.gpu, cuda, 11.8) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128
• Tests / unittests-macos (3.8, macos-m1-stable) / macos-job (gh)
  RuntimeError: operator torchvision::nms does not exist
• Tests / unittests-macos (3.9, macos-m1-stable) / macos-job (gh)
  RuntimeError: operator torchvision::nms does not exist
• 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 (3.8, windows.4xlarge, cpu) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128
• Tests / unittests-windows (3.8, windows.g5.4xlarge.nvidia.gpu, cuda, 11.8) / 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

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

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

• Build M1 Conda / pytorch/vision / upload / conda-py3_8-cpu (gh) (trunk failure)
  Unable to find any artifacts for the associated workflow
• Tests / unittests-macos (3.10, macos-m1-stable) / macos-job (gh) (trunk failure)
  RuntimeError: operator torchvision::nms does not exist
• Tests / unittests-macos (3.11, macos-m1-stable) / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• Tests / unittests-macos (3.12, macos-m1-stable) / macos-job (gh) (trunk failure)
  RuntimeError: operator torchvision::nms does not exist

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[pmeier]

LGTM. Since the files cannot be downloaded by us, maybe add a sentence to the docstring on how to get test labels?

[pmeier]

Oh FFS. Took me two minutes to notice the extra space. I share your feelings here, but maybe point out the space in the comment?

[github-actions]

Hey @NicolasHug!

You merged this PR, but no labels were added.
The list of valid labels is available at https://github.com/pytorch/vision/blob/main/.github/process_commit.py