Unused index buffers

[alasram]

Describe the bug
I noticed that many index buffers are created when tiles are loaded but they are never used in an actual draw which means creating and uploading these buffers is a waste.
The reason for the creation of these buffers needs to be investigated and once the cause is understood we need to avoid creating these buffers.

[sjg-wdw]

Can you take a look at this one @alexcristici
First question would be how we tell these buffers are being created and then not used.

[alasram]

This commit prints to the log index buffers that aren't used in any draw