Enable OSS coreml python tests

[metascroy]

As titled

[pytorch-bot]

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❌ 1 New Failure

As of commit 362265c with merge base 5200778 ():

NEW FAILURE - The following job has failed:

• Check Labels / Check labels (gh)
  RuntimeError: Error checking labels: PR does not have required labels

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[JacobSzwejbka]

Only concern is mac env tests are expensive, but obviously testing stuff like this is what they are for.

[jathu]

nit: delete

Suggested change

# backends/apple/coreml

[jathu]

This will fail on non-Apple platforms. We need to see if we can selectively include this only on macOS

[metascroy]

@jathu yeah, I saw this in the CI failures. Is there currently a good way to specify this granularity in ET's testing framework?

[jathu]

Maybe try adding a --ignore option for linux here:

https://github.com/pytorch/executorch/blob/cb3eba0d7f630bc8cec0a9cc1df8ae2f17af3f7a/.ci/scripts/unittest-linux-cmake.sh#L10C1-L10C7