Timestamp in CSV[BUG]

[Kruzerson]

Describe the bug

Hello. When I try to create a report from a search, the "@timestamp" field is not displayed in the report. How can I add it there?

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Discover'
2. Click on 'Reporting'
3. Create report
4. No Timestamp

Expected behavior
I want to see a timestamp in report

OpenSearch Version
v 2.15.0

Dashboards Version
v 2.15.0

Screenshots

[pawelw1]

This issue is related to #668 and opensearch-project/dashboards-reporting#335 .

[frangabs]

We have the same problem since versions ago. Any news? I am surprised if all the columns appear in the front end and then in the report they are not there. In OpenSearch 1.X.X it does appear

[dblock]

[Catch All Triage - 1, 2, 3, 4, 5]

[dblock]

Someone from reporting should take a look, however maybe @frangabs you can help bisecting this regression to a commit?

[Kruzerson]

@pawelw1 any changes?