Add support for symfony v8

[W0rma]

This PR fixes the remaining deprecation warnings in symfony 7.4:

Since symfony/validator 7.3: Passing an array of options to configure the "Symfony\Component\Validator\Constraints\IdenticalTo" constraint is deprecated.

Since symfony/validator 7.4: Support for evaluating options in the base Constraint class is deprecated.

Since symfony/validator 7.3: Passing an array of options to configure the "FOS\RestBundle\Validator\Constraints\Regex" constraint is deprecated

Since symfony/http-foundation 7.4: Request::get() is deprecated, use properties ->attributes, query or request directly instead.

With these changes it is possible to allow the installation of symfony v8

[alexander-schranz]

Awesome thank you @W0rma and thx @goetas. @goetas If there is something else needed to get this released let me know.

[goetas]

https://github.com/FriendsOfSymfony/FOSRestBundle/releases/tag/3.9.0-beta1

[W0rma]

Seems like I forgot to adjust this version constraint 🤦‍♂️

I'm going to create PR to fix this.