Inline Arr::pluck() in data_get() (#25938)

- avoids "cross-calling" between these two methods
- 10~20% performance boost

src/Illuminate/Support/helpers.php

@@ -463,7 +463,11 @@ function data_get($target, $key, $default = null)
                     return value($default);
                 }
 
-                $result = Arr::pluck($target, $key);
+                $result = [];
+
+                foreach ($target as $item) {
+                    $result[] = data_get($item, $key);
+                }
 
                 return in_array('*', $key) ? Arr::collapse($result) : $result;
             }