[4.x] Fix statamic.web middleware not being merged (#8935)

Co-authored-by: Jason Varga <[email protected]>

src/Providers/AppServiceProvider.php

@@ -29,10 +29,9 @@ public function boot()
         $this->app->booted(function () {
             Statamic::runBootedCallbacks();
             $this->loadRoutesFrom("{$this->root}/routes/routes.php");
+            $this->registerMiddlewareGroup();
         });
 
-        $this->registerMiddlewareGroup();
-
         $this->app[\Illuminate\Contracts\Http\Kernel::class]
             ->pushMiddleware(\Statamic\Http\Middleware\PoweredByHeader::class)
             ->pushMiddleware(\Statamic\Http\Middleware\CheckComposerJsonScripts::class)
@@ -166,14 +165,16 @@ public function register()
 
     protected function registerMiddlewareGroup()
     {
-        $this->app->make(Router::class)->middlewareGroup('statamic.web', [
+        $router = $this->app->make(Router::class);
+
+        collect([
             \Statamic\Http\Middleware\StacheLock::class,
             \Statamic\Http\Middleware\HandleToken::class,
             \Statamic\Http\Middleware\Localize::class,
             \Statamic\Http\Middleware\AddViewPaths::class,
             \Statamic\Http\Middleware\AuthGuard::class,
             \Statamic\StaticCaching\Middleware\Cache::class,
-        ]);
+        ])->each(fn ($middleware) => $router->pushMiddlewareToGroup('statamic.web', $middleware));
     }
 
     protected function addAboutCommandInfo()