chore: remove raw sql from env relationship

- raw sql should not be used whenever possible
- using sql to order on the relationship environment_variables() causes custom sorting to break or be additionally complicated

app/Models/Application.php

@@ -845,15 +845,7 @@ class Application extends BaseModel
     public function environment_variables()
     {
         return $this->morphMany(EnvironmentVariable::class, 'resourceable')
-            ->where('is_preview', false)
-            ->orderByRaw("
-                CASE
-                    WHEN is_required = true THEN 1
-                    WHEN LOWER(key) LIKE 'service_%' THEN 2
-                    ELSE 3
-                END,
-                LOWER(key) ASC
-            ");
+            ->where('is_preview', false);
     }
 
     public function runtime_environment_variables()