Convert phpspec to PHPUnit tests

[loic425]

It's time to get rid of phpspec/phpspec package.
We'll try not to mock everything in the future, but to make conversion easier, we use the package phpspec/phpunit-prophecy.

ChatGPT is able to make the conversion of each class 🤖
So we use it :) but reviewing changes is necessary 👓

Bundle

• Context
• Controller
• DependencyInjection
• Doctrine
• Event
• EventListener
• Form
• Grid
• Routing
• Storage
• Twig
• Validator

Component

• Doctrine [phpspec-2-phpunit] migration of tests (Doctrine) #928
• Exception [phpspec-2-phpunit] migration of tests (Exception) #929
• Generator [phpspec-2-phpunit] migration of tests (Generator) #930
• Grid [phpspec-2-phpunit] migration of tests (Grid) #931
• Humanizer [phpspec-2-phpunit] migration of tests (Humanizer) #932
• Metadata [phpspec-2-phpunit] migration of tests (Metadata) #933
• Model
• Reflection
• State
• StateMachine
• Symfony
• Translation
• Twig
• Winzou