testdata: Amend full-example/main.tf, add local value with provider f…

…unction to verify terraform-docs can properly parse

terraform/testdata/full-example/main.tf

@@ -29,5 +29,9 @@ module "foo" {
 }
 
 module "foobar" {
- source = "[email protected]:module/path?ref=v7.8.9"
+ source = "[email protected]:module/path?ref=v7.8.9"
+}
+
+locals {
+ arn = provider::aws::arn_parse("arn:aws:iam::444455556666:role/example")
 }