ArticleBundle 2.6.x still using forms from config/forms_sulu_25_or_lower/article_settings.xml

[treck]

Q	A
Bug?	yes
New Feature?	no
SuluArticleBundle Version	2.6.3
Sulu Version	2.6.4

Actual Behavior

At the sulu Backend the lastModified fields for Articles as pushed in #655 are still not visible.

Expected Behavior

lastModified Fields should be visible.

Steps to Reproduce

Just look at the article settings on PHP 8.3

Possible Solutions

sulu/article-bundle/DependencyInjection/SuluArticleExtension.php:192
replaced \class_exists with \interface_exists as LocalizedLastModifiedBehavior seems to be an interface.
Solved my problem of the not showing lastModified fields.

[alexander-schranz]

@treck Your solution make sense, do you want to create a merge request for it?