feat: Remove magical parameters from being injected (#371)

* 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.

* Add "coder_workspace" data source

* feat: Remove magical parameters from being injected

This is a much cleaner abstraction. Explicitly declaring the user
parameters for each provisioner makes for significantly simpler
testing.

cli/projectcreate_test.go

@@ -86,7 +86,7 @@ func TestProjectCreate(t *testing.T) {
 		matches := []string{
 			"organization?", "y",
 			"name?", "test-project",
-			"somevar:", "value",
+			"somevar", "value",
 			"project?", "y",
 			"created!", "n",
 		}