Add support for KMS key creation to project factory (#3518)

* initial implementation

* context

* tfdoc

* add support for autokey to projects

* fix typo

modules/project-factory/outputs.tf

@@ -37,6 +37,7 @@ locals {
           }
         }
       }
+      kms_keys   = local.projects_kms_keys[k]
       number     = module.projects[k].number
       project_id = module.projects[k].project_id
       log_buckets = {
@@ -85,6 +86,11 @@ output "iam_principals" {
   value       = local.iam_principals
 }
 
+output "kms_keys" {
+  description = "KMS key ids."
+  value       = local.kms_keys
+}
+
 output "log_buckets" {
   description = "Log bucket ids."
   value = merge([