[BUG] Flakey link for datasource plugin tests

[ashwin-pc]

Describe the bug

We have 2 instances of http://datasource.com that points to a misconfigured url. When our lychee link checker runs during CI/CD, the check fails when this link is not reachable

To Reproduce
The issue is intermittent so here is a reference failure

https://github.com/opensearch-project/OpenSearch-Dashboards/actions/runs/3653727844/jobs/6173497842

Expected behavior
The link should point to one of the excluded urls e.g. example.com or this domain should be added to the excluded domains. I propose the former since we already have an exhaustive list of excluded URLs ant these 2 use cases dont seem to justify the need for another one.

OpenSearch Version
3.0

Dashboards Version
3.0

Plugins

Please list all plugins currently enabled.

Screenshots

If applicable, add screenshots to help explain your problem.

Host/Environment (please complete the following information):

• OS: [e.g. iOS]
• Browser and version [e.g. 22]

Additional context

[zhongnansu]

Found lychee exclude list from https://github.com/opensearch-project/OpenSearch-Dashboards/blob/main/TESTING.md#additional-checks

Thanks for submitting the issue. I wasn't aware of this during development tho, maybe like you said, it's flaky. Anyway, we'll fix it following best practice
@ashwin-pc

[ashwin-pc]

No worries. Created the issue for tracking purposes since I saw that a lot of tests were having to be rerun because of it. That website will also be getting a lot of traffic from our CI workflows lol.

[ashwin-pc]

@zhongnansu can we close this issue now that those links are fixed?