Upgrading to latest OpenSearch version

[VachaShah]

Description

• Upgrade to latest OpenSearch version.
• Update compatibility matrix.

Issues Resolved

List any issues this PR will resolve, e.g. Closes [...].

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[VachaShah]

Looking into why the integration tests are failing against OpenSearch 2.6.0 and 2.7.0. When I run the tests on my local, they seem to succeed. Happening in #486 as well.

[harshavamsi]

Looking into why the integration tests are failing against OpenSearch 2.6.0 and 2.7.0. When I run the tests on my local, they seem to succeed. Happening in #486 as well.

They're failing because of security permission, no permissions for [] and User [name=admin, backend_roles=[admin], requestedTenant=null] this is the error I get when I try to run the tests against the latest versions of OpenSearch.

[reta]

They're failing because of security permission, no permissions for [] and User [name=admin, backend_roles=[admin], requestedTenant=null] this is the error I get when I try to run the tests against the latest versions of OpenSearch.

Could be opensearch-project/security@94db5db ? (security plugin)