Fix: Removed custom paginated and added iterator

[Dedsec0098]

Fix #1798

Changes Made:

1. I have removed paginated ( ) and have added interator ( ) to improve the performance in terms of compute time and memory usage.
2. Removed per_page parameter as Django's built-in .iterator() doesn't accept this parameter.

@keshav-space I have made the changes according to the issue and it is passing all the tests on my local system, however I am not sure how to exactly run the iterations for advisories to check the new response time can you please suggest me on how can I run those and also If you have any suggestions please let me know I will make the changes required.

[keshav-space]

Thanks @Dedsec0098, use the appropriate chunk size in the iterator and also remove the paginated from our base queryset manager.

[Dedsec0098]

Sure, I'll start making the changes required

[Dedsec0098]

Hey @keshav-space I have made the changes you asked, please let me know if any further changes are required.

[pombredanne]

Thanks.
This is not actionable until tested. If you are able to submit code that is minimally tested and does run and is not AI generated, come back, but only then.
I am going to close all your other PRs for the same reason.