Alert on machine learning artifact import

What does this MR do and why?

Alert on machine learning artifact import

Related to #465456 (closed)

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Before	After
No success alert

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, 'FooModel16').execute.payload
model_version = Ml::CreateModelVersionService.new(model,version: '3.1.4').execute

Upload some files

• Go to the project URL in your browser
• Open the "Deploy" and "Model registry" under it.
• Find the model FooModel16
• Upload some files with subfolders
• See success alert