Svg Image Constraint Validator is not used in Media Library modal upload form

Problem/Motivation

We've added a new FileIsSvgImageConstraintValidator in 🐛 Error uploading svg from the media tab Active to replace the old #file_validator approach. It works fine for the SVG Image field and the Media upload form at /media/add/vector_image, but it doesn’t get applied in the Media Library’s modal upload form.

Steps to reproduce

• Install the SVG Image Field and submodule for Media integration.
• Enable Media Library core module.
• Ensure uploading an invalid SVG to /media/add/vector_image.
• Add a Media field to Article content type, allowing Vector Image bundle for upload.
• Select the Media Library formatter for the field's Form Display configuration.
• Try to upload the same invalid SVG via the Media Library modal on /node/add/article.

Proposed resolution

Ensure the Media Library form uses the File upload Constraint Validator class.

Remaining tasks

User interface changes

API changes

Data model changes