[Backport 2.x] Add functional test for datasources at observability dashboards plugin

[opensearch-trigger-bot]

Backport 8cd68dc from #987

need fix DCO

[RyanL1997]

Hi @Hailong-am, I think we need to by pass DCO for backport:

Commit sha: [5e6eaba](https://github.com/opensearch-project/opensearch-dashboards-functional-test/pull/998/commits/5e6eaba4683d28ecd0b4c3392faaccf59dae5729), 
Author: Jialiang Liang, Committer: github-actions[bot]; 
Can not find "Jialiang Liang [[email protected]](mailto:[email protected])", 
in ["Ryan Liang [[email protected]](mailto:[email protected])", "Ryan Liang [[email protected]](mailto:[email protected])", "Ryan Liang [[email protected]](mailto:[email protected])", "Ryan Liang [[email protected]](mailto:[email protected])"].

It was expecting the bot's generated profile instead of my correct email address.

[Hailong-am]

Hi @Hailong-am, I think we need to by pass DCO for backport:

Commit sha: [5e6eaba](https://github.com/opensearch-project/opensearch-dashboards-functional-test/pull/998/commits/5e6eaba4683d28ecd0b4c3392faaccf59dae5729), 
Author: Jialiang Liang, Committer: github-actions[bot]; 
Can not find "Jialiang Liang [[email protected]](mailto:[email protected])", 
in ["Ryan Liang [[email protected]](mailto:[email protected])", "Ryan Liang [[email protected]](mailto:[email protected])", "Ryan Liang [[email protected]](mailto:[email protected])", "Ryan Liang [[email protected]](mailto:[email protected])"].

It was expecting the bot's generated profile instead of my correct email address.

can you check Keep my email addresses private in page https://github.com/settings/emails? if that checkbox is checked, there will have similar issue in future backport

[Hailong-am]

@RyanL1997 would you mind do manual backport and close this one?

[RyanL1997]

@Hailong-am , Yes, I have unchecked the box. Can we re-run it again? And if it doesn't work, I will manually backport it.

[Hailong-am]

@Hailong-am , Yes, I have unchecked the box. Can we re-run it again? And if it doesn't work, I will manually backport it.

re-run should not work, as the commit has not change.

[RyanL1997]

@Hailong-am Cloud you plz close this one due to the open of #1024