Include command history in the [product]-supportpkg.log

In the context of NGINX Ingress Controller (but applicable to any product to be supported by `nginx-supporpkg`) we ought to log the actual command line input by the user: e.g.
`2024/07/08 08:42:09.158943 nginx-supportpkg.go:48: kubectl nginx-supportpkg -p nic -n default,kic-0`

* This would help confirming the namespaces that were captured and validate the captured data for any error/misses.