[rubygems/rubygems] Skip to load vendored libraries if it's already loaded

rubygems/rubygems@3f5093fac9

Author: hsbt

lib/rubygems/vendored_net_http.rb

@@ -1,3 +1,5 @@
 # frozen_string_literal: true
 
-require_relative "vendor/net-http/lib/net/http"
+# Ruby 3.3 and RubyGems 3.5 is already load Gem::Timeout from lib/rubygems/net/http.rb
+# We should avoid to load it again
+require_relative "vendor/net-http/lib/net/http" unless defined?(Gem::Net::HTTP)

lib/rubygems/vendored_timeout.rb

@@ -1,3 +1,5 @@
 # frozen_string_literal: true
 
-require_relative "vendor/timeout/lib/timeout"
+# Ruby 3.3 and RubyGems 3.5 is already load Gem::Timeout from lib/rubygems/timeout.rb
+# We should avoid to load it again
+require_relative "vendor/timeout/lib/timeout" unless defined?(Gem::Timeout)