Support iam_by_principals_additive in 0-org-setup (#3387)

* Support iam_by_principals_additive in 0-org-setup

* Fix typo

modules/project-factory/projects.tf

@@ -123,10 +123,11 @@ module "projects-iam" {
     kms_keys       = local.ctx.kms_keys
     iam_principals = local.ctx_iam_principals
   })
-  iam                   = lookup(each.value, "iam", {})
-  iam_bindings          = lookup(each.value, "iam_bindings", {})
-  iam_bindings_additive = lookup(each.value, "iam_bindings_additive", {})
-  iam_by_principals     = lookup(each.value, "iam_by_principals", {})
+  iam                        = lookup(each.value, "iam", {})
+  iam_bindings               = lookup(each.value, "iam_bindings", {})
+  iam_bindings_additive      = lookup(each.value, "iam_bindings_additive", {})
+  iam_by_principals          = lookup(each.value, "iam_by_principals", {})
+  iam_by_principals_additive = lookup(each.value, "iam_by_principals_additive", {})
   service_agents_config = {
     create_primary_agents = false
     grant_default_roles   = false

modules/project-factory/schemas/project.schema.json

@@ -108,6 +108,9 @@
     "iam_by_principals": {
       "$ref": "#/$defs/iam_by_principals"
     },
+    "iam_by_principals_additive": {
+      "$ref": "#/$defs/iam_by_principals"
+    },
     "labels": {
       "type": "object"
     },
@@ -843,4 +846,4 @@
       }
     }
   }
-}
+}