Factories refactor (#1843)

* factories refactor doc

* Adds file schema and filesystem organization

* Update 20231106-factories.md

* move factories out of blueprints and create new factories  README

* align factory in billing-account module

* align factory in dataplex-datascan module

* align factory in billing-account module

* align factory in net-firewall-policy module

* align factory in dns-response-policy module

* align factory in net-vpc-firewall module

* align factory in net-vpc module

* align factory variable names in FAST

* remove decentralized firewall blueprint

* bump terraform version

* bump module versions

* update top-level READMEs

* move project factory to modules

* fix variable names and tests

* tfdoc

* remove changelog link

* add project factory to top-level README

* fix cludrun eventarc diff

* fix README

* fix cludrun eventarc diff

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Co-authored-by: Simone Ruffilli <sruffilli@google.com>

modules/net-vpc/subnets.tf

@@ -18,9 +18,10 @@
 
 locals {
   _factory_data = {
-    for f in try(fileset(var.factories_config.subnets_folder, "**/*.yaml"), []) :
-    trimsuffix(basename(f), ".yaml") => yamldecode(file("${var.factories_config.subnets_folder}/${f}"))
+    for f in try(fileset(local._factory_path, "**/*.yaml"), []) :
+    trimsuffix(basename(f), ".yaml") => yamldecode(file("${local._factory_path}/${f}"))
   }
+  _factory_path = try(pathexpand(var.factories_config.subnets_folder), null)
   _factory_subnets = {
     for k, v in local._factory_data :
     "${v.region}/${try(v.name, k)}" => {