[compiler][playground] create playground API in pipeline, and allow spaces in pass names

Summary:
1. Minor refactor to provide a stable API for calling the compiler from the playground
2. Allows spaces in pass names without breaking the appearance of the playground by replacing spaces with   in pass tabs

ghstack-source-id: 12a43ad86c16c0e21f3e6b4086d531cdefd893eb
Pull Request resolved: https://github.com/facebook/react/pull/30988