[5.6] Add @canany and @elsecanany blade directive

[fuxu]

There is a use case for authorization directive

<table>
  <tr>
    <th>...</th>
    @canany(['edit_post', 'delete_post'])
    <th>Actions</th>
    @endcanany
  </tr>
  <tr>
    <td>...</td>
    @canany(['edit_post', 'delete_post'])
    <td>
      @can('edit_post')
      <button>Edit</button>
      @endcan
      @can('delete_post')
      <button>Delete</button>
      @endcan
    </td>
    @endcanany
  </tr>
</table>

---

I know I can implement it in AppServiceProvider::boot() using Custom If Statements as follow

Blade::if('canany', function ($abilities) {
    return app(\Illuminate\Contracts\Auth\Access\Gate::class)->any($abilities);
});

But I think it maybe helpful for others.