[9.x] Fixes usage of Migrator without output

[nunomaduro]

This pull request fixes an issue on the Migrator that may not run pending migrations if there is no Output instance on the class itself. This was a bug introduced at #43065, as the given closure only runs if there is an Output:

        $this->write(Task::class, $name, fn () => $this->runMigration($migration, 'up'));
        
     // ...

    protected function write($component, ...$arguments)
    {
        if ($this->output) {
            with(new $component($this->output))->render(...$arguments);
        }
    }

This pull requests addresses this issue, by giving a null output to the Task component, ensuring this way that the given task always run:

    protected function write($component, ...$arguments)
    {
        with(new $component(
            $this->output ?: new NullOutput()
        ))->render(...$arguments);
    }

Fixes #43325.