[Quest API] Adjust GetCloseMobList calls internally

[Akkadius]

This PR does a few minor but performance impacting changes

• We shouldn't reserve on the container when we don't know for certain whether or not we end up filtering ourself in the list, we end up returning blank values to the user in the Quest API results. You can double loop but the juice is not worth the squeeze performance wise - I measured this very recently.
• Also - we are even further filtering based on the distance passed in by the user which further filters down the close list that is compiled from 600 units