Fix test suite failures caused by ESM-only @octokit/core and probot dependencies (#938)

* Initial plan

* Initial plan for fixing failing test suites

Co-authored-by: decyjphr <57544838+decyjphr@users.noreply.github.com>

* Fix failing test suites caused by ESM-only dependencies

Co-authored-by: decyjphr <57544838+decyjphr@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: decyjphr <57544838+decyjphr@users.noreply.github.com>

Author: Copilot