Leverage project-level workload identity in FAST CI/CD (#3535)

* Leverage project-level WIF in FAST CI/CD

* add new context namespace, improve outputs, fix tests and inventories

* make YAML linter happy

* README

modules/organization/outputs.tf

@@ -129,3 +129,13 @@ output "workforce_identity_provider_names" {
     for k, v in google_iam_workforce_pool_provider.default : k => v.name
   }
 }
+
+output "workforce_identity_providers" {
+  description = "Workforce Identity provider attributes."
+  value = {
+    for k, v in google_iam_workforce_pool_provider.default : k => {
+      name = v.name
+      pool = try(google_iam_workforce_pool.default[0].name, null)
+    }
+  }
+}