Added documentation for Security Permission Simulation API

[pranathz]

Description

Added documentation for Security Configuration Permission Simulation API feature in OpenSearch.

Related PRs

Security Configuration Permission Simulation API 5473

Checklist

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[github-actions]

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[kolchfa-aws]

Thank you, @pranathz! What version is this for? Also, could you fix DCO please?

[pranathz]

@kolchfa-aws This is for version 3.2.0 and above.
The DCO issue has been fixed.

[kolchfa-aws]

@pranathz Thanks! Is this ready for doc review or is it still under tech review?

[pranathz]

still under tech review.

[kolchfa-aws]

@pranathz Please use the API template for this documentation. Also, please include front matter in the page, as described here. Thanks!

[cwperks]

@kolchfa-aws the documentation in this PR is not reflective of recent changes to the security PR. @nagarajg17 @pranathz can we update this to show the url param added?