Add Laravel 11 support on tests

[dfsmania]

Question	Answer
Issue or Enhancement	Enhancement
License	MIT

What's in this PR?

• Include Laravel 11 and PHP 8.3 on the tests matrix
• Update checkout and cache actions to v4
• Improve commentaries on the workflow
• Improve the upload code coverage step
• Remove scrutinizer/ocular from dev dependencies, it's instead required in the upload coverage step
• Fix tests to provide compatibility with Laravel 11

Checklist

• I tested these changes.

[dfsmania]

Caution

Again facing problems with uploading coverage to scrutinizer....

Logic that involves downloading ocular.phar do not work:

wget https://scrutinizer-ci.com/ocular.phar
php ocular.phar code-coverage:upload --format=php-clover coverage.clover

This gives the same error we faced before:

[Guzzle\Common\Exception\InvalidArgumentException]  
Invalid handle provided 

Also, we can't use the scrutinizer/ocular dev dependency when testing on Laravel 11. because there's a conflict of package requirements with ocular. So, the only workaround we can use for now, is to keep uploading coverage for Laravel 10.X version, but removing scrutinizer/ocular from the dev dependencies and require it with composer when uploading the coverage.