Enforce Label Action Does Not Properly Delay

[blink1073]

Description

The enforce label action is using the original github context to check the label, which means that our 60 second delay is having no effect. We need to write our own GitHub Script that gets the current set of labels.

Reproduce

Create a ChangeLog PR using Jupyter Releaser.
Releaser adds a "documentation" label after creating the PR.
The Enforce Label action fails.

Expected behavior

The enforce label workflow should pass.