[Search Connectors] add specific docs for different policy templates

[meghanmurphy1]

Proposed commit message

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.
• I have verified that any added dashboard complies with Kibana's Dashboard good practices

Author's Checklist

• [ ]

How to test this PR locally

Related issues

Screenshots

[meghanmurphy1]

I have tried adding .md that match the name of the policy template I would like to have a different 'overview' tab for rather than the README.md . But for some reason, I can't seem to get them to link

I have also tried going off this but I wasn't allowed to build the package when adding this to the policy template :(

[elastic-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube

[meghanmurphy1]

So after doing some more digging, Looks like elastic-package build will render the different *.md files into docs/ if they're in _dev/build/docs. But, the markdown files still aren't being linked to the different integration. Getting closer though!

[elasticmachine]

💔 Build Failed

• Buildkite Build
• Commit: 59147e39d6b7fe2a7eb7892fdf45c707df5bd6c8

Failed CI Steps

• Check integrations elastic_connectors

History

• 💔 Build #20444 failed fee768ce29d4de45929fd8e778395728c9917781
• 💚 Build #20401 succeeded 5c2b41622b1ad9904d09e9212e006d408b9614aa

[mergify]

⚠️ The sha of the head commit of this PR conflicts with #12592. Mergify cannot evaluate rules on this PR. ⚠️