DEV: Add the missing app subdirectory (#9499)

* DEV: Add missing  directory to the Discourse ember app

* DEV: Resolve imports correctly

lib/freedom_patches/raw_handlebars.rb

@@ -65,7 +65,11 @@ class Ember::Handlebars::Template
   end
 
   def global_template_target(namespace, module_name, config)
-    "#{namespace}[#{template_path(module_name, config).inspect}]"
+    # We need this for backward-compatibility reasons.
+    # Plugins may not have an app subdirectory.
+    path = template_path(module_name, config).inspect.gsub('discourse/templates/', '')
+
+    "#{namespace}[#{path}]"
   end
 
   # FIXME: Previously, ember-handlebars-templates uses the logical path which incorrectly