[symfony] Skip enums, closures and exception classes in "NoNullableServiceInConstructorRule"

[bmdevel]

NoNullableServiceInConstructorRule reports some nullable constructor parameters that are values, not container services. This PR skips three more of them, in the same way the rule already skips Throwable and DateTimeInterface parameters.

1. Enum parameters

An enum is never a container service, so ?SomeEnum $status is an optional value:

final class Booking
{
    public function __construct(
        private readonly ?PaymentType $paymentType, // was reported
    ) {
    }
}

2. Closure parameters

An optional callback such as ?Closure $handler = null is a value too.

3. Exception classes

An exception is built with new at the throw site, never by the container. Its constructor carries error context, for example a nullable HTTP response:

final class ResponseErrorException extends RuntimeException
{
    public function __construct(
        private readonly ?ResponseInterface $response = null, // was reported
    ) {
        parent::__construct('...');
    }
}

The rule now skips a class that is itself a Throwable, in the same way it skips the \Exception\ namespace.

Each case has a fixture in NoNullableServiceInConstructorRuleTest. All three were reported before the change. The full suite, ECS, PHPStan and Rector pass.

[TomasVotruba]

Legit, thank you