Move export events to separate folder

[nikitavemuri]

Why are these changes needed?

• Move export events from session_latest/logs/events to session_latest/logs/export_events
• Keeping both event types in the same folder doesn't cause any issue for Ray -- export event files are already filtered out for /events API in

  ray/python/ray/dashboard/modules/event/event_utils.py

  Line 22 in 1e48a03

  all_source_types = set(event_consts.EVENT_SOURCE_ALL)

• However moving these to a separate folder would be better for existing downstream consumers to avoid handling export events in the events folder if they turn the flag on

Related issue number

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  • I've added any new APIs to the API Reference. For example, if I added a
    method in Tune, I've added it in doc/source/tune/api/ under the
    corresponding .rst file.
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• Testing Strategy
  • Unit tests
  • Release tests
  • This PR is not tested :(

[nikitavemuri]

Updating so TestNoUserInfoInLogs::test_basic passes regardless of value of FF