[Feature Request] Allow separation of security configurations between Aux transports

[finnegancarroll]

Is your feature request related to a problem? Please describe

Per #17406 aux transport security configurations are configured under a single setting "namespace", i.e. However, aux transports are pluggable and multiple implementations may be enabled and configured.

plugins.security.ssl.aux.<setting option...>

Describe the solution you'd like

Ideally in the case where multiple aux transports are configured and enabled, the user should distinguish between security configurations for each aux transport.

plugins.security.ssl.aux.arrow.<setting option...>
plugins.security.ssl.aux.grpc.<setting option...>
plugins.security.ssl.aux.other.<setting option...>

From the developer perspective each new aux transport should be declared and consumed by security plugin to enable basic TLS client cert authentication without need to introduce sweeping settings changes to security plugin or discrete implementations for the particular transport.

Additional discussion: #17406 (comment)
PR adding single aux security config namespace to security plugin: opensearch-project/security#5152

Related component

Plugins

Describe alternatives you've considered

Keeping aux transports as a single security configuration which all transports will share.

Additional context

No response