bug: File is null in model registry

What does this MR do and why?

bug: File is null in model registry

Related to #483195 (closed)

MR acceptance checklist

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Before	After

How to set up and validate locally

• Go to any project and then go to Deploy/Model registry
• Create a model
• Create a model version without a file upload
• You should get the version created and navigate there without a file being uploaded.