Skip Total Records

[elogistical]

Thanks for the great lib, one issue i think many of us having is processing large Mysql Data with joins in innoDB engine.
can you add something like this:
https://yajrabox.com/docs/laravel-datatables/master/skip-total-records

Skip total records aims to improve dataTables response time by skipping the total records count query and settings its value equals to the filtered total records.

I just tested and you can Re-Produce src/Datatables.php:243

`
$this->response['recordsTotal'] = $this->db->count($this->builder->filtered);

///REMOVE THIS BLOCK
if($this->builder->query->sql === $this->builder->filtered->sql) {
$this->response['recordsFiltered'] = $this->response['recordsTotal'];
} else {
$this->response['recordsFiltered'] = $this->db->count($this->builder->filtered);
}

////END REMOVE
`

[elogistical]

Please review this issue

[n1crack]

added with 2.3.8