[Profiler][Memory] Export raw timestamped events in export_memory_timeline_raw (#105094)
Summary:
Rather than processing the events into a time and sizes plot, dump the actual events as (timestamp, action, num of bytes, category) when output file ends in `raw.json.gz`.
This can allow downstream analysis tools to process these events. It also avoids having to control the granularity of the previous json.gz in memory profiler.
Test Plan: CI Tests
Differential Revision: D47416544
Pulled By: aaronenyeshi
Pull Request resolved: https://github.com/pytorch/pytorch/pull/105094
Approved by: https://github.com/davidberard98
