[11.x] Add getConnection() Method to Factory Class for Retrieving Database Connection (#53237)

* Add a getter to get the connection of a Factory

* Test for getConnection() method inside the Illuminate\Database\Eloquent\Factories\Factory class

* return correct type docblock

* Update Factory.php

* Update DatabaseEloquentFactoryTest.php

---------

Co-authored-by: Taylor Otwell <[email protected]>

Author: jonathanpmartins

src/Illuminate/Database/Eloquent/Factories/Factory.php

@@ -728,6 +728,16 @@ public function count(?int $count)
         return $this->newInstance(['count' => $count]);
     }
 
+    /**
+     * Get the name of the database connection that is used to generate models.
+     *
+     * @return string
+     */
+    public function getConnectionName()
+    {
+        return $this->connection;
+    }
+
     /**
      * Specify the database connection that should be used to generate models.
      *