Add asset_search to folder, project, and organization modules. (#3707)

modules/project/variables.tf

@@ -48,6 +48,16 @@ variable "asset_feeds" {
   }
 }
 
+variable "asset_search" {
+  description = "Cloud Asset Inventory search configurations."
+  type = map(object({
+    asset_types = list(string)
+    query       = optional(string)
+  }))
+  default  = {}
+  nullable = false
+}
+
 variable "auto_create_network" {
   description = "Whether to create the default network for the project."
   type        = bool