Update the lease key to contain package's version

🌱 Context

In !114317 (merged) we started obtaining a lease when creating a new npm package.

During the rollout of the FF on gitlab.com, the issue was revealed that the Package Registry might get many continuous requests for the same package name and project_id but with with different version. Thus, we need to take version into account when obtaining a lease.

What does this MR do and why?

• Update the lease key to contain a package's version.

Screenshots or screen recordings

No

How to set up and validate locally

1. Enable the npm_obtain_lease_to_create_package feature flag:

   Feature.enable(:npm_obtain_lease_to_create_package, Project.first)

2. Create a rake task lib/tasks/packages/race_condition.rake that's going to simulate a parallel creation of npm packages using Thread.

   # frozen_string_literal: true
   
   desc 'GitLab | Packages | Race condition'
   namespace :gitlab do
     namespace :packages do
       task race_condition: :environment do
         # Similar setup to what we have in the tests
         user = User.first
         project = Project.find(1)
         params = JSON.parse(
           File.read('spec/fixtures/packages/npm/payload.json').gsub('@root/npm-test', 'my-package')
         ).with_indifferent_access
   
         wait_for_it = true
   
         threads = Array.new(10) do |i|
           Thread.new do
             true while wait_for_it
   
             modified_params = Gitlab::Json.parse(params.to_json.gsub("1.0.1", "1.0.#{i}")).with_indifferent_access
   
             ::Packages::Npm::CreatePackageService.new(project, user, modified_params).execute
           end
         end
         wait_for_it = false
         threads.each(&:join)
       end
     end
   end

3. Execute the rake task from the previous step.

   $ rake gitlab:packages:race_condition

4. In rails console verify amount of created npm packages. It should be 10

   Packages::Package.where(name: 'my-package').count

5. After the verification is done, it's time to delete the rake task.

   $ rm -rf lib/tasks/packages

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.