feature: Delete artifacts from a model version

What does this MR do and why?

feature: Delete artifacts from a model version

Related to Delete artifacts from a model version (#461197 - closed)

Followup refactor: User permissions for ML models, versi... (#461314)

MR acceptance checklist

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Before	After

How to set up and validate locally

Create the file

Go to rails console using bin/rails c

Feature.enable(:model_registry)
project = Project.find(26)
model = Ml::CreateModelService.new(project, 'FooModel6').execute.payload
model_version = Ml::CreateModelVersionService.new(model,version: '3.1.4').execute
fn='boo.txt'; File.write(fn, 'Hello'); model_version.package.package_files.create! file: File.new(fn), file_name: fn, status: :default

Delete the file

• Go to the project URL in your browser
• Open the "Deploy" and "Model registry" under it.
• Find the model FooModel6
• Delete the file.