Ensure NPM dev fixtures have unique name

NPM package names must be unique across a namespace. Previously the
development seed would fail if 2 of the 5 random projects selected to be
seeded were in the same group because the same package name would be
reused to seed the second project. To fix this, we append a random hex
string so that this conflict is unlikely to happen.

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/213786

ee/db/fixtures/development/26_packages.rb

 # frozen_string_literal: true
+
 class Gitlab::Seeder::Packages
   attr_reader :project
 
@@ -12,7 +13,7 @@ class Gitlab::Seeder::Packages
 
   def seed_npm_packages
     5.times do |i|
-      name = "@#{@project.root_namespace.path}/npm_package_#{i}"
+      name = "@#{@project.root_namespace.path}/npm_package_#{SecureRandom.hex}"
       version = "1.12.#{i}"
 
       params = JSON.parse(