chore: [Psalm] workarround for Tests\Support\Controllers\Hello does not exist

[kenjis]

Description

• scan tests/_support/Controllers for Psalm

I don't know why these errors are reported.

ERROR: UndefinedClass - tests/system/CodeIgniterTest.php:114:33 - Class, interface or enum named Tests\Support\Controllers\Hello does not exist (see https://psalm.dev/019)
        $routes->set404Override('Tests\Support\Controllers\Hello::index');


ERROR: UndefinedClass - tests/system/CodeIgniterTest.php:133:33 - Class, interface or enum named Tests\Support\Controllers\Popcorn does not exist (see https://psalm.dev/019)
        $routes->set404Override('Tests\Support\Controllers\Popcorn::pop');


ERROR: UndefinedClass - tests/system/CodeIgniterTest.php:152:33 - Class, interface or enum named Tests\Support\Controllers\Popcorn does not exist (see https://psalm.dev/019)
        $routes->set404Override('Tests\Support\Controllers\Popcorn::pop');

https://github.com/codeigniter4/CodeIgniter4/actions/runs/5276222376/jobs/9542644621

Checklist:

• Securely signed commits
• [] Component(s) with PHPDoc blocks, only if necessary or adds value
• [] Unit testing, with >80% coverage
• [] User guide updated
• Conforms to style guide

[kenjis]

In this check, there is only one error.

ERROR: UndefinedClass - tests/system/CodeIgniterTest.php:114:33 - Class, interface or enum named Tests\Support\Controllers\Hello does not exist (see https://psalm.dev/019)
        $routes->set404Override('Tests\Support\Controllers\Hello::index');

https://github.com/codeigniter4/CodeIgniter4/actions/runs/5284903965/jobs/9562840079