Kubernetes API audit logs enabled on EKS-A clusters to be able to debug and log RBAC issues

**What would you like to be added**:

Currently, this can be enabled manually following the Log Backend configuration here:

https://kubernetes.io/docs/tasks/debug/debug-cluster/audit/

EKSA Should allow configuring audit logging through EKS-A Cluster configuration file so that, manual modification to the API server config can be avoided.

**Why is this needed**:
Security and audit purposes.

As a EKSA Admin, I want to know who deleted a application pod or retrieved a secret value from Cluster using Audit logs.

Start with the Kubernetes audit logging and Log Backend configuration documentation linked in the issue, then trace how EKS-A cluster configuration reaches the API server configuration. Done means audit logging can be configured through the EKS-A Cluster configuration file without manual API server changes, with logs sufficient to investigate RBAC actions.

Written by the indexing model from the issue text.