fix BUCK rules

[shoumikhin]

Summary:
Forward-fix:

Duplicate entries for google/protobuf/__init__.py:
third-party/pypi/protobuf/4.22.0/google/protobuf/__init__.py (fbsource//third-party/pypi/protobuf/4.22.0:py srcs)
and
third-party/protobuf/protobuf/python/google/protobuf/__init__.py (fbsource//third-party/protobuf:protobuf-py-cpp srcs)

Reviewed By: cccclai

Differential Revision: D66413908

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/7051

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❌ 3 New Failures

As of commit ecd7263 with merge base b3f2a79 ():

NEW FAILURES - The following jobs have failed:

• Apple / build-benchmark-app / macos-job (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 1
• Apple / build-demo-ios / macos-job (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 1
• Apple / upload-frameworks-ios (gh)
  ##[error]Credentials could not be loaded, please check your action inputs: Could not load credentials from any providers

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This pull request was exported from Phabricator. Differential Revision: D66413908