provide name for hbs template only components (#2581)

Author: patricklx

ember_debug/libs/render-tree.js

@@ -661,6 +661,15 @@ export default class RenderTree {
       }
 
       if (node.type === 'component' && !node.instance) {
+        if (
+          node.name === '(unknown template-only component)' &&
+          node.template?.endsWith('.hbs')
+        ) {
+          node.name = node.template
+            .split(/\\|\//)
+            .slice(-1)[0]
+            .slice(0, -'.hbs'.length);
+        }
         node.instance = this._createSimpleInstance(
           'TemplateOnlyComponent',
           node.args.named