NuGet package API: Do not enqueue jobs directly

• Please check this box if this contribution uses AI-generated content (including content generated by GitLab Duo features) as outlined in the GitLab DCO & CLA. As a benefit of being a GitLab Community Contributor, you can request access to GitLab Duo.

What does this MR do and why?

This is #329180 (closed), for NuGet.

How to test this locally

NuGet packages can be processed in two ways:

• inline within the upload request.
• with a background job.

Both ways can be tested by following the setup described in !176359 (merged). Skip the feature flag steps as it doesn't exist anymore (that change has been released)

app/services/packages/nuget/create_temporary_package_service.rb

@@ -14,7 +14,7 @@ def execute
 
         ApplicationRecord.transaction do
           response = create_temporary_package
-          raise ServiceResponse.error(message: response.message) if package.error?
+          raise ServiceResponse.error(message: response.message) if response.error?
 
           response = create_package_file(response.payload[:package])
           raise ServiceResponse.error(message: response.message) if response.error?