Bugfix: Check suite re-run handling

[rrotaru]

I noticed that my check re-runs were hanging without completing. It turns out that the rerunChecks() handler expected us to pass a config argument that is not there. I am updating it to follow the same process as the other PR handlers.

Proposed Changes

• Add calls to collect config on check re-run event
• Update payload references for check re-run config gathering

Readiness Checklist

• If this change requires documentation, it has been included in this pull request

Reviewer Checklist

• If a functional change has occurred, testing the integration has been performed
• This PR has been categorized with a label (1 of automation, bug, documentation, enhancement, infrastructure, or performance) for the changelog

[rrotaru]

Not sure why this is failing. The CI test error says:

    TypeError: Cannot read property 'owner' of undefined

      93 |     // Get config default from org-level repo .github/rally/<REPO_NAME>.yml
      94 |     let orgConfigResponse = await context.github.repos.getContents({
    > 95 |       owner: context.payload.repository.owner.login,
         |                                         ^
      96 |       repo: orgConfigRepoName,
      97 |       path: '.github/rally/' + context.payload.repository.name + '.yml'
      98 |     })

      at RallyValidate.getDefaultConfig (lib/RallyValidate.js:95:41)
      at RallyValidate.handlePullRequest (lib/RallyValidate.js:141:38)
      at Object.<anonymous> (test/RallyValidate.test.js:79:21)

But the API docs show that this should be present (it is working in GHE).
https://developer.github.com/webhooks/event-payloads/#pull_request

[primetheus]

@rrotaru thanks for opening this up! I'll have it tested by end of day 🙇🏽

[primetheus]

LGTM ✨