[10.x] Fix for attributes being escaped on Dynamic Blade Components

[pascalbaljet]

I understand this is an edge case, but I'm extending the DynamicComponent class as I needed some helper methods there:

use Illuminate\View\DynamicComponent;

class CustomComponent extends DynamicComponent
{
    // custom helper methods...
}

Since v10.48, it fails to pass attributes. This code snippet results in Argument #1 ($name) must be of type string, null given:

<x-custom-component :component="$componentName" :name="$name" />

The attributes are filtered out in attributesToStringWithExistingComponentData() (see #50403), except for Dynamic Components. However, it only checks for the exact class name, not for subclasses of DynamicComponent. This PR fixes that.