Update Inferentia lab to use Trainium

### What would you like to be added?

Currently the complication step in the Inferentia lab is done on a node in the existing MNG. This should be changed to use a Trainium instance type as a complement to Inferentia on the training side.

### Why is this needed?

This seems like a more appropriate instance type for this scenario.

Start by locating the Inferentia lab and its existing MNG configuration, then inspect the compilation step and the instance type it uses. The work is done when that step runs on a Trainium instance type while Inferentia remains part of the training scenario.

Written by the indexing model from the issue text.