fix: add provider_meta for google-beta to ASM submodule (#1186)

Author: morgante

modules/asm/versions.tf

@@ -21,4 +21,8 @@ terraform {
  provider_meta "google" {
  module_name = "blueprints/terraform/terraform-google-kubernetes-engine:asm/v20.0.0"
  }
+
+ provider_meta "google-beta" {
+ module_name = "blueprints/terraform/terraform-google-kubernetes-engine:asm/v20.0.0"
+ }
 }