Bump the min Symfony version to 7.3

[stof]

This also bumps the min PHP version to 8.2 as Symfony 7 does not support PHP 8.1.

[stof]

The deprecation of UserInterface::eraseCredentials in Symfony 7.3 expects to add a Deprecated attribute on the method implementation to opt-out of the warning once the logic is migrated.
However, older Symfony versions always call the method, which would trigger a runtime deprecation warning on PHP 8.4+. Bumping the min Symfony version is the simplest way to resolve this. As my own usage of the bundle is on Symfony 7, I have no interest spending time building a more complex solution. Projects still using symfony 6 can keep using an older release of the bundle as well.