NuGet - Object storage upload route for package files

Implements a new route to handle the NuGet endpoint that will intercept package file uploads.

The route should be

/api/v4/projects/<project_id>/packages/nuget

Reference:

!412 (merged)

Related Issues:

Investigation: gitlab#33590 (closed) NuGet Parent issue: gitlab#20050 (closed)

This is step 2 of 7 in implementing the NuGet API MVC:

1. gitlab#36496 (closed) - API Skeleton + The Service Index + authentication
2. #235 (closed) - Workhorse upload route
3. gitlab#36499 (closed) - Push/Delete Service
4. gitlab#36502 (closed) - Metadata extraction job, DB changes, and dependencies
5. gitlab#36504 (closed) - Package Metadata Service
6. gitlab#36505 (closed) - Search Service
7. gitlab#36506 (closed) - Package Content Service