[rubygems/rubygems] Try to load Gem::BUNDLED_GEMS on Bundler

  `bundle exec ruby foo.rb` ignore to load gem_prelude.rb. Because warnings feature
  is not working with `bundle exec ruby`.

rubygems/rubygems@a0d4ed92a7

lib/bundler/rubygems_integration.rb

@@ -374,6 +374,11 @@ def replace_entrypoints(specs)
       specs_by_name = add_default_gems_to(specs)
 
       reverse_rubygems_kernel_mixin
+      begin
+        # bundled_gems only provide with Ruby 3.3 or later
+        require "bundled_gems"
+      rescue LoadError
+      end unless defined?(::Gem::BUNDLED_GEMS)
       replace_require(specs) if defined?(::Gem::BUNDLED_GEMS)
       replace_gem(specs, specs_by_name)
       stub_rubygems(specs)