Apply limit on DatabaseEngine before applying additional constrai…

…nts (#621)

The previous PR broke Laravel Nova implementation on Global Search where we use the following:

```php
App\Models\User::search('Laravel')->tap(fn ($query) => $query->limit(5))->get();
``` 

### Before

Callback using `tap()` take priority over default.

#### After

`limit()` take priority over `tap()` and I would consider this a breaking change.

src/Engines/DatabaseEngine.php

@@ -112,7 +112,6 @@ protected function searchModels(Builder $builder, $page = null, $perPage = null)
             ->when(! $this->getFullTextColumns($builder), function ($query) use ($builder) {
                 $query->orderBy($builder->model->getKeyName(), 'desc');
             })
-            ->take($builder->limit)
             ->get();
     }
 
@@ -132,7 +131,7 @@ protected function buildSearchQuery(Builder $builder)
         );
 
         return $this->constrainForSoftDeletes(
-            $builder, $this->addAdditionalConstraints($builder, $query)
+            $builder, $this->addAdditionalConstraints($builder, $query->take($builder->limit))
         );
     }