[8.x] Cast linkCollection to array

[iamgergo]

The new linksCollection method stays a collection instance when calling paginate()->toArray().
The genererated JSON will be the same, so this should not affect anything.

Some tests can fail because it expects an array and gets a collection. For example in my inertia app:

$response->assertPropValue('results', function ($results) {
    $this->assertEquals(
        $results,
        $this->user->addresses()->paginate(25)->toArray()
     );
});

--- Expected
+++ Actual
@@ @@
     'from' => 1
     'last_page' => 1
     'last_page_url' => 'http://localhost/bazar/users/...page=1'
-    'links' => Array (...)
+    'links' => Illuminate\Support\Collection Object (...)
     'next_page_url' => null
     'path' => 'http://localhost/bazar/users/...resses'
     'per_page' => 25

[szepeviktor]

Some tests can fail

And they do fail.