[9.x] Adds withoutEagerLoad function

[mahmoudmohamedramadan]

According to this PR I have added a withoutEagerLoad to prevent the given relationships from being eagerly loaded.

$user = \App\Models\User::with(['post', 'attachment'])->first();

// This line will return the first user with the post relationship
return $user->withoutEagerLoad(['attachment'])->first();