NuGet package API: Do not enqueue jobs directly

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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)

lib/api/nuget_project_packages.rb

@@ -95,13 +95,10 @@ def upload_nuget_package_file(symbol_package: false)
           project, current_user, declared_params.merge(build: current_authenticated_job)
         ).execute(:nuget, name: temp_file_name(symbol_package))
 
-        package_file = ::Packages::CreatePackageFileService.new(package, file_params.merge(build: current_authenticated_job))
-                                                            .execute
+        ::Packages::CreatePackageFileService.new(package, file_params.merge(build: current_authenticated_job)).execute
 
         yield(package) if block_given?
 
-        ::Packages::Nuget::ExtractionWorker.perform_async(package_file.id) # rubocop:disable CodeReuse/Worker
-
         created!
       end