(GH-3310) Load bolt builtin content if it is present

This commit shows an alternate approach for handling bundled-ruby: true on local transport for core types and providers. Instead of always syncing those plugins (almost always not-necessary) we simply pass through the buitin content location to the apply_catalog task. If it is detected on the target, builtin content is added to the loadpath. This allows us to avoid pluginsyncing when its not always necessary and handing the case of local transport.

lib/bolt/applicator.rb

@@ -284,6 +284,7 @@ def apply_ast(raw_ast, targets, options, plan_vars = {})
                   'catalog' => Puppet::Pops::Types::PSensitiveType::Sensitive.new(catalog),
                   'plugins' => Puppet::Pops::Types::PSensitiveType::Sensitive.new(plugins),
                   'apply_settings' => @apply_settings,
+                  'bolt_builtin_content' => @modulepath.full_modulepath - @modulepath.user_modulepath || [],
                   '_task' => catalog_apply_task.name,
                   '_noop' => options[:noop]
                 }

libexec/apply_catalog.rb

@@ -52,6 +52,19 @@
     $LOAD_PATH << dir unless $LOAD_PATH.include?(dir)
   end
 
+  # In the case we are applying on a bolt runner and using bundled-ruby over local transport
+  # we will want to load code shipped with bolt. This is last on the load path and therefore
+  # explicitly packaged plugins should take precedence
+  args['bolt_builtin_content'].each do |builtin_dir|
+    next unless Dir.exist?(builtin_dir)
+    Dir.foreach(builtin_dir) do |dir|
+      unless ['.', '..'].include? dir
+        full_path = File.join(builtin_dir, dir, 'lib')
+        $LOAD_PATH << full_path unless $LOAD_PATH.include?(full_path)
+      end
+    end
+  end
+
   if (conn_info = args['_target'])
     unless (type = conn_info['remote-transport'])
       puts "Cannot execute a catalog for a remote target without knowing it's the remote-transport type."