api: Implement MVP of stream pull trigger

[victorges]

What does this pull request do? Explain your changes. (required)

This implements the simplest form of triggering a stream to start pulling, by making a
call to the stream playbackUrl after creating the stream.

The main missing feature here would be using the pull.location field to call the Catalyst
instance closest to the pull location. This might be implemented later through a Catalyst
API in catalyst-api instead, so Studio doesn't need to track the state of the serf cluster
to know what nodes are online.

Specific updates (required)

• Refactored the fetchWithTimeoutAndRedirects function as I was reading it to understand the logic
• Implemented triggerCatalystPullStart for real with some TODO/comments for context

How did you test each of these updates (required)
yarn test

Does this pull request close any open issues?
Implements ENG-1569

Checklist

• I have read the CONTRIBUTING document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
livepeer-studio	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 2, 2024 7:32pm