Improve z3 trace management (#1916)
* Fix OOM and type mismatch
* Toggle prefetching
* Disable z3 prefetching for inference (temp workaround)
* Fix zero3 tracing issues
* Remove debug prints
* Enable prefetch for inference
* Code clarity
* Invalidate trace cache
* Trace cache invalidation when needed
Separate nvme prefetch from all-gather prefetch
* Track last used step id
* Use debug name in error message
* Construct param trace from module trace
Co-authored-by: Jeff Rasley <jerasley@microsoft.com>
