docs(eks): add documentation about EKS onboarding (#6853)

Co-authored-by: Pepe Fagoaga <pepe@prowler.com>

kubernetes/job.yaml

@@ -1,16 +1,3 @@
-apiVersion: v1
-kind: Namespace
-metadata:
-  name: prowler-ns
-
----
-apiVersion: v1
-kind: ServiceAccount
-metadata:
-  name: prowler-sa
-  namespace: prowler-ns
-
----
 apiVersion: batch/v1
 kind: Job
 metadata:

kubernetes/prowler-sa.yaml

@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: prowler-ns
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: prowler-sa
+  namespace: prowler-ns