Modify GraphQL PR info query to adjust for workflow consolidation
We used to have a ton of workflow runs each with few jobs, but now we are switching it up to fewer workflow runs with many jobs each.
Thus edit the query so we can get the maximum checks for a PR, which is a preliminary thing for when we want to add mroe required status checks :)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/75820
Approved by: https://github.com/seemethere, https://github.com/osalpekar
