refactor: remove obsolete All class

[drupol]

Today, thanks to @dantleech (in https://www.dantleech.com/blog/2024/02/18/my-php-problems/), I discovered that iterator_to_array had a second parameter bool $preserve_keys = true...

Therefore, this PR improve the overall performance of this library.

[what-the-diff]

PR Summary

• Optimization of all method in Collection.php
  The code for retrieving all elements in our data collection has been simplified. It no longer uses a more complicated 'Operation' process, but instead directly converts the existing collection to an array. This makes our program more efficient.