[Bugfix] Move observer and g_idx until after module in onloaded

[kylesayrs]

Purpose

• Fix calibration of offloaded models

Changes

• Previously, g_idx was being fetched before the module was onloaded, meaning that it was being fetch as a meta tensor
  • Now g_idx is fetched after the module parameters are onloaded

Testing

• @anmarques was able to compress an offloaded model using activation ordering