[code-infra] IaC for our GitHub org

[Janpot]

Summary:

See https://mui-org.notion.site/Configuration-of-the-repositories-306cbfe7b6608047ba91e4c7a7bff846

We have the intention to sync settings between repositories, but the sync is only performed during repository creation. There is no enforcement or automation for our repo configuration. Moreover creating a new repository and going through this guide is cumbersome.

Solution:

Introduce terraform and their github provider and treat our GH org infra as code. We encode the "gold standard" in a terraform module and define all our repositories from this gold standard. New repository creation will be as much as adding another entry, and syncing a settings change will be instant, no bifurcation possible.

We can also use the netlify provider for our netlify setup

Adjacent

• Our AWS resources should be managed by terraform as well.
• All of our render.com can be managed by blueprints
• Avoid all manual fiddling with infra settings

[linear]

PUB-206

[oliviertassinari]

Cross referrencing to this other issue about the potential of using terraform https://github.com/mui/mui-private/issues/1533.