SPL Performance improvement: Kubernetes AWS detect suspicious kubectl calls

[bowesmana]

The table statement is redundant. Should be

`aws_cloudwatchlogs_eks` userAgent=kubectl* sourceIPs{}!=127.0.0.1 sourceIPs{}!=::1 src_user=system:anonymous  
| stats  count by src_ip src_user verb userAgent requestURI 
|`kubernetes_aws_detect_suspicious_kubectl_calls_filter`

[Bhavin Patel]

Thank you! PR for the fix: #2454