[9.x] Fixes pagination count when Laravel\Scout\Builder contains custom query callback

[crynobone]

This solved issue #450

Current Behaviour

e.g: GIven users table contains 100 rows with Laravel with 50 male and 50 female.

$users = User::search('Laravel')->paginate();

// $users->total() == 100

$users = User::search('Laravel')->query(function ($builder) {
    return $builder->where('gender', 'male');
})->paginate();

// $users->total() == 100 // which is incorrect.

New Behaviour

If Laravel\Scout\Builder contain custom query callback, we will count the number of rows from eloquent and not use search results coming from Scout engines.

$users = User::search('Laravel')->query(function ($builder) {
    return $builder->where('gender', 'male');
})->paginate();

// $users->total() == 50

Signed-off-by: Mior Muhammad Zaki crynobone@gmail.com