feat: Add option to attach additional policies to the runner agent instance (#258)

* Add optional variable containing the ARNs of policies to be added to the runner.

* Correct indendation.

* Create the policy attachements.

* Fix errors raised by "terraform validate".

* Update readme via pre-commit

* Fixing policy variable description

Co-authored-by: Niek Palm <[email protected]>
Co-authored-by: Matthias Kay <[email protected]>

Author: 3 people

variables.tf

@@ -630,6 +630,6 @@ variable "log_group_name" {
 
 variable "runner_iam_policy_arns" {
   type        = list(string)
-  description = "List of policy ARNs to be added to the instance profile of the runners."
+  description = "List of policy ARNs to be added to the instance profile of the gitlab runner agent ec2 instance."
   default     = []
 }