refactor to use octokit to get repos instead of node-fetch

[thescientist13]

Related Issue

N / A

Have been seeing the init tests fail intermittently a number of times now and not sure why. I thought it was a rate limit issue (60 / hr) but even if no tests have been run for a couple days, it will still fail right away. 😵‍💫

• https://github.com/ProjectEvergreen/greenwood/runs/5149709882?check_suite_focus=true
• https://github.com/ProjectEvergreen/greenwood/runs/5149709927?check_suite_focus=true
• https://github.com/ProjectEvergreen/greenwood/runs/5074715896?check_suite_focus=true
• https://github.com/ProjectEvergreen/greenwood/runs/4811762484?check_suite_focus=true

Summary of Changes

1. Swap out node-fetch with octokit SDK

Not sure if this will actually fix it per se, but will run this PR a few times through GitHub actions and see if it helps

[thescientist13]

lol, first run failed due to #876 😅 😭

[hutchgrant]

lgtm

[thescientist13]

Interestingly enough, this issue hasn't come up in our GitHub Actions at all recently. 🤔 🤷‍♂️

[thescientist13]

So this issue basically hasn't reproduced itself in close to a year now, so I think we can close this one and leave it as is. As part of #957 , we can migrate to fetch though 👍