[8.x] Fix router inconsistency for namespaced route groups

[imanghafoori1]

Following my previous PR which was rejected #34784, I wanted to shed more light on the situation.
From laravel 5.6 #24385 til laravel 8.x we can define our routes like this:

use use App\Http\Controllers\TasksController;

Route::group(['namespace' => 'Whatever'], function () {
    Route::get('{task}/edit', [TasksController::class, 'edit'])->middleware('auth');
});

and it works. The 'Whatever' namespace does NOT get appended, since we have used the array notation to refer to the controller method.

All and all, the order in which the middleware(... and get(... methods are called in the chain, should have NO effect on their behavior or how they accept parameters. (according to the docs.)

But if we only reverse the order of get and middleware method calls in the example above suddenly the 'Whatever' namespace gets appended to the controller and stops working.

use use App\Http\Controllers\TasksController;

Route::group(['namespace' => 'Whatever'], function () {
    Route::middleware('auth')->get('{task}/edit', [TasksController::class, 'edit']);
});

and that is definitely wrong.