[Symfony61] Skip CommandConfigureToAttributeRector on non-constant configure() values

[TomasVotruba]

Fixes the regression reported in #1054.

CommandConfigureToAttributeRector inlined the argument of setName()/setDescription()/setAliases()/setHidden() straight into #[AsCommand], without checking it is a compile-time constant. A runtime value produced invalid PHP:

// before
class ExampleCommand extends Command
{
    public function __construct(private readonly string $description) {}

    public function configure(): void
    {
        $this->setDescription($this->description);
    }
}

// after — invalid, attribute args must be constant
#[AsCommand(description: $this->description)]
class ExampleCommand extends Command
{
    public function __construct(private readonly string $description) {}
}

Now the rule only extracts scalar / const-fetch / class-const / constant-array values and leaves any non-constant setX() call untouched in configure():

 class ExampleCommand extends Command
 {
     public function __construct(private readonly string $description) {}

     public function configure(): void
     {
         $this->setDescription($this->description);
     }
 }

Also returns null when nothing could be extracted, so the rule no longer reports a no-op change.

Credit to @Jean85 for the report and reproduction fixture in #1054.