[10.x] Add assertJsonPathCanonicalizing method

[gdebrauwer]

When testing API calls, I often have lots of tests that need to check if a json response contains all the expected ids without looking at the order of the ids in the response. For example, in a API call test that asserts if a querystring filter option works correctly, you will not (or not easily be able to) setup your expected models with fixed and known order in the response. That is currently not possible as assertJsonPath takes the order of the expected values into account.

To fix this, this PR adds a dedicated json assertion. I used the "canonicalizing" suffix because that is what PHPUnit calls this kind of assertion. (But maybe someone knows a better, more Laravel-like 😅, name for this method?)

$users = User::factory()->count(2)->create();

$this->get('/api/users')->assertJsonPathCanonicalizing('data.*.id', $users->pluck('id')->all());