feat: Add kubernetes standard labels to avoid manual mistakes on the managed aws-auth configmap (#989)

aws_auth.tf

@@ -67,6 +67,15 @@ resource "kubernetes_config_map" "aws_auth" {
   metadata {
     name      = "aws-auth"
     namespace = "kube-system"
+    labels = merge(
+      {
+        "app.kubernetes.io/managed-by" = "Terraform"
+        # / are replaced by . because label validator fails in this lib 
+        # https://github.com/kubernetes/apimachinery/blob/1bdd76d09076d4dc0362456e59c8f551f5f24a72/pkg/util/validation/validation.go#L166
+        "terraform.io/module" = "terraform-aws-modules.eks.aws"
+      },
+      var.aws_auth_additional_labels
+    )
   }
 
   data = {