Check commits for bypass flag

Overview

To handle false positives, for example in cases where a developer need to commit a dummy secret that is used in tests, and to allow users to skip secrets detection entirely in case of timeouts for instance, we are introducing a special commit message flag similar to [ci skip].

Implementation Plan

• Determine the exact variation to be used: [skip secret detection], [secret detection skip], or both.
• Update the new push check to:
  • Skip scanning if the variation exists in any of the commit messages associated with the push.
  • Display instructions on how to skip secret detection if needed using the flag.