fix: remove double r- prefix from role name locals

The aws-iam-role module prepends r- internally, so passing r-name
resulted in r-r-name. Strip the prefix from patch_role_name,
patch_execution_role_name, and patch_execproxy_role_name.

locals.tf

@@ -24,9 +24,9 @@ locals {
 
   kms_alias_name = "k-kms-${var.name_prefix}"
 
-  patch_role_name           = "r-${var.name_prefix}"
-  patch_execution_role_name = "r-${var.name_prefix}-execution"
-  patch_execproxy_role_name = "r-${var.name_prefix}-execproxy"
+  patch_role_name           = var.name_prefix
+  patch_execution_role_name = "${var.name_prefix}-execution"
+  patch_execproxy_role_name = "${var.name_prefix}-execproxy"
 
   patch_policy_name           = "p-${var.name_prefix}"
   patch_execution_policy_name = "p-${var.name_prefix}-execution"