Upgrade to Symfony 7.3

[rosier]

This updates all dependencies and upgrade to Symfony v7.3.0-RC1

Also fixes the following deprecations:

• The "errors.xml" routing configuration file is deprecated, import "errors.php" instead.
• The "profiler.xml" routing configuration file is deprecated, import "profile.php" instead.
• The "xdt.xml" routing configuration file is deprecated, import "xdt.php" instead.
• Not setting the "property_info.with_constructor_extractor" option explicitly is deprecated because its default value will change in version 8.0.
• The "App\Security\PostVoter::voteOnAttribute()" method will require a new "Vote|null $vote" argument in the next major version of its parent class "Symfony\Component\Security\Core\Authorization\Voter\Voter", not defining it is deprecated.

[javiereguiluz]

Symfony 7.3 is now available (https://symfony.com/blog/symfony-7-3-0-released) so we can update to the final stable version. Thanks!

[javiereguiluz]

Merged! I updated dependencies to the stable version while merging. Thanks!