Add HashiBot behavior to lock closed issues after 30 days. (#10691)

.hashibot.hcl

@@ -1,10 +1,13 @@
-queued_behavior "release_commenter" "releases" {
-  repo_prefix = "terraform-provider-"
+poll "closed_issue_locker" "locker" {
+  schedule             = "0 50 14 * * *"
+  closed_for           = "720h" # 30 days
+  max_issues           = 500
+  sleep_between_issues = "5s"
 
   message = <<-EOF
-    This has been released in [version ${var.release_version} of the Terraform AWS provider](${var.changelog_link}). Please see the [Terraform documentation on provider versioning](https://www.terraform.io/docs/configuration/providers.html#provider-versions) or reach out if you need any assistance upgrading.
+    I'm going to lock this issue because it has been closed for _30 days_ ⏳. This helps our maintainers find and focus on the active issues.
 
-    For further feature requests or bug reports with this functionality, please create a [new GitHub issue](https://github.com/terraform-providers/terraform-provider-aws/issues/new/choose) following the template for triage. Thanks!
+    If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!
   EOF
 }
 
@@ -32,6 +35,16 @@ behavior "deprecated_import_commenter" "hashicorp_terraform" {
   EOF
 }
 
+queued_behavior "release_commenter" "releases" {
+  repo_prefix = "terraform-provider-"
+
+  message = <<-EOF
+    This has been released in [version ${var.release_version} of the Terraform AWS provider](${var.changelog_link}). Please see the [Terraform documentation on provider versioning](https://www.terraform.io/docs/configuration/providers.html#provider-versions) or reach out if you need any assistance upgrading.
+
+    For further feature requests or bug reports with this functionality, please create a [new GitHub issue](https://github.com/terraform-providers/terraform-provider-aws/issues/new/choose) following the template for triage. Thanks!
+  EOF
+}
+
 # Catch the following in issues:
 # *aws_XXX
 # * aws_XXX