Standardise reuse variable from project module and implement for net-vpc (#3205)

* exposing the network_id from the net-vpc module for use with tag bindings

* convert vpc_create to vpc_reuse

* Changed the reuse vars to standardised attributes

* fixed readme tests and schemas

* modified apigee blueprint to use vpc_reuse with network_id passthrough

---------

Co-authored-by: Ludovico Magnocavallo <ludomagno@google.com>

modules/gcs/README.md

@@ -40,7 +40,7 @@ module "project" {
   name   = var.project_id
   project_reuse = {
     use_data_source = false
-    project_attributes = {
+    attributes = {
       name             = var.project_id
       number           = var.project_number
       services_enabled = ["storage.googleapis.com"]
@@ -133,7 +133,7 @@ module "project" {
   name   = var.project_id
   project_reuse = {
     use_data_source = false
-    project_attributes = {
+    attributes = {
       name             = var.project_id
       number           = var.project_number
       services_enabled = ["storage.googleapis.com"]