Dev: use Superglobals service and remove superglobals

[kenjis]

Use Services::superglobals() and remove all superglobals ($_SERVER, $_GET) in the code base (except in the Superglobals class).

CodeIgniter4/system/Config/Services.php

Line 723 in 60b22bf

public static function superglobals(

CodeIgniter4/system/Superglobals.php

Line 19 in 60b22bf

final class Superglobals

[paulbalandan]

This is a good phpstan rule.