Allow use `use` in traits

[mkornaukhov03]

<?php

namespace Traits;

trait AuthorTrait {
  use A\B\C;
  protected static function foo(int $id): D {
    $user = get_user($id);
    return $user->check() ?
        E::bar()  // from A\B\C
      : E::baz(); // form A\B\C

  }
}

Compile Error: https://github.com/VKCOM/kphp/blob/e02602ea4180ac3da5dc0edfbb055fbc11be26f4/compiler/gentree.cpp#L2231-L2233

relates to KPHP-1332