Automatic rollback variable change to a list of string type

[josea2pp]

Describe the Feature

Describe Feature
When trying to select the type of automatic rollback by default it uses "DEPLOYMENT_FAILURE"

the suggested change is to change the value from string to list(string) to be able to use both options to cover those edge cases cover

Expected Behavior

able to select both options for automatic rollback

Use Case

cover edge cases in which applications are healthy but throwing multiples errors

Describe Ideal Solution

variable "auto_rollback_configuration_events" {
  type        = list(string)
  default     = "DEPLOYMENT_FAILURE"
  description = "The event type or types that trigger a rollback. Supported types are `DEPLOYMENT_FAILURE` and `DEPLOYMENT_STOP_ON_ALARM`."

}

 dynamic "auto_rollback_configuration" {
    for_each = local.auto_rollback_configuration_enabled ? [1] : [0]

    content {
      enabled = local.auto_rollback_configuration_enabled
      events  = var.auto_rollback_configuration_events
    }
  }

allowing use both options for automatic rollback

Additional Context

I think will make more dynamic the use of the module to cover edge cases