Add user_permissions fields to PackageType and PackageDetailsType

What does this MR do and why?

This MR adds the new user_permissions fields to PackageType and PackageDetailsType that will supersede existing can_destroy field. And also marks existing can_destroy field as deprecated.

Screenshots or screen recordings

How to set up and validate locally

Run the following steps in rails console.

1. Create a new package.

   def fixture_file_upload(*args, **kwargs)
     Rack::Test::UploadedFile.new(*args, **kwargs)
   end
   
   p = FactoryBot.create(:npm_package)
   
   p.id # We will need the package's ID in the next step

2. Visit http://gdk.test:3000/-/graphql-explorer and create a graphql query. The response should contain userPermissions field.

   query {
     package(id: "gid://gitlab/Packages::Package/<package_id>") {
       userPermissions {
         destroyPackage
       }
     }
   }

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #390754 (closed)