Improvements to _istioctl get_ to show key fields #5538
Description
Currently _istioctl get type shows NAME/TYPE/NAMESPACE. I'd rather see:
istioctl get gateways
NAME HOSTS AGE
guestbook-gateway * 3d
istioctl get virtualservices
NAME GATEWAYS HOSTS HTTP TCP AGE
guestbook guestbook-gateway * 1 0 3d
istioctl get destinationrule
NAME HOST SUBSETS AGE
helloworld-service helloworld-service version-1-0; version-2-0 3d
istioctl get serviceentry
NAME HOSTS PORTS AGE
googleapis *.googleapis.com 443 2d