Fix pipeline execution policies skipping when allowed

What does this MR do and why?

This MR fixes skipping of pipeline execution policies when they are allowed to be skipped. The bug happened as a result of refactoring that was merged around the same time as the addition of skip_ci for PEP.

References

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• Allow users to configure skip ci behavior for p... (!173480 - merged)
• Refactor pipeline policy context to be more gen... (!174969 - merged)

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