Description

In screen that list relations and also the connections, OpenCTI lazy load every connection one by one.
We need to batch load the connections to speedup the loading.

Reproducible Steps

Steps to create the smallest reproducible scenario:

1. Go to /dashboard/threats/intrusion_sets/4774ee2c-cb72-4cf4-a1bb-731d5b2475e8/knowledge/overview

Expected Output

Quick rendering of Global Kill Chain.

Actual Output

Low rendering speed. Could also lead to elastic error depending of the amount of data.