Add HEIC decoder

[NicolasHug]

libheif is L-GPL, still need to figure out how to properly link against it. This isn't exposed publicly for now, and isn't built by default either.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/vision/8597

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❌ 1 New Failure, 6 Unrelated Failures

As of commit 5107ed2 with merge base a59c939 ():

NEW FAILURE - The following job has failed:

• Tests / unittests-windows (3.9, windows.g5.4xlarge.nvidia.gpu, cuda, 11.8) / windows-job (gh)
  AttributeError: '_OpNamespace' 'image' object has no attribute '_jpeg_version'

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

• CMake / windows (windows.4xlarge, cpu) / windows-job (gh) (detected as infra flaky with no log or failing log classifier)
• Tests / unittests-linux (3.9, linux.g5.4xlarge.nvidia.gpu, cuda, 11.8) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• Tests / unittests-windows (3.10, windows.4xlarge, cpu) / windows-job (gh) (detected as infra flaky with no log or failing log classifier)
• Tests / unittests-windows (3.11, windows.4xlarge, cpu) / windows-job (gh) (detected as infra flaky with no log or failing log classifier)
• Tests / unittests-windows (3.12, windows.4xlarge, cpu) / windows-job (gh) (detected as infra flaky with no log or failing log classifier)
• Tests / unittests-windows (3.9, windows.4xlarge, cpu) / windows-job (gh) (detected as infra flaky with no log or failing log classifier)

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[github-actions]

Hey @NicolasHug!

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