* ci: Update DataDog GitHub branch to fallback to GITHUB_REF
This was detecting branches, but not our "main" branch before.
Hopefully this fixes it!
* Add basic Terraform Provider
* Rename post files to upload
* Add tests for resources
* Skip instance identity test
* Add tests for ensuring agent get's passed through properly
* Fix linting errors
* Add echo path
* Fix agent authentication
* fix: Convert all jobs to use a common resource and agent type
This enables a consistent API for project import and provisioned resources.