DEV: Update linting setup and fix issues (#17345)

Re-lands #16119 and #17298

* Update eslint-config-discourse
* Update linting workflow
* Prettier-ignore stuff
* Update template-lint config
* Auto-fix template issues
* Fix various template issues
  Mostly incorrect attributes and unused templates
* Prettier js files
* Fix template auto-fix regressions
* Small css tweak

Co-authored-by: Peter Wagenet <peter.wagenet@gmail.com>

app/assets/javascripts/admin/addon/services/admin-tools.js

@@ -46,9 +46,10 @@ export default Service.extend({
     });
     controller.setProperties({ postId: opts.postId, postEdit: opts.postEdit });
 
-    return (user.adminUserView
-      ? Promise.resolve(user)
-      : AdminUser.find(user.get("id"))
+    return (
+      user.adminUserView
+        ? Promise.resolve(user)
+        : AdminUser.find(user.get("id"))
     ).then((loadedUser) => {
       controller.setProperties({
         user: loadedUser,