Improve guidance of logging kube-audit or kube-audit-admin

[BernieWhite]

Existing rule

Azure.AKS.AuditLogs

Suggested rule

Update the guidance. Both kube-audit or kube-audit-admin should not be enabled. Update the docs to reflect that:

• Either log can be enabled.
• Enabling logging for both would increase cost and duplicate some log data.

Pillar

Security

Additional context

• https://azure.github.io/PSRule.Rules.Azure/en/rules/Azure.AKS.AuditLogs/
• https://learn.microsoft.com/azure/aks/monitor-aks-reference#resource-logs