feat: Add -o wide flag to print the ROLE column

[danielpacak]

This PR adds a new flag -o wide to print the [Cluster]Role referred to by the [Cluster]RoleBinding:

$ kubectl who-can get pods -n webinar
ROLEBINDING            NAMESPACE  SUBJECT           TYPE            SA-NAMESPACE
webinar-ns-admin-view  webinar    webinar-ns-admin  ServiceAccount  webinar

CLUSTERROLEBINDING                           SUBJECT                                 TYPE            SA-NAMESPACE
cluster-admin                                system:masters                          Group
local-path-provisioner-bind                  local-path-provisioner-service-account  ServiceAccount  local-path-storage
system:controller:deployment-controller      deployment-controller                   ServiceAccount  kube-system
system:controller:endpoint-controller        endpoint-controller                     ServiceAccount  kube-system
system:controller:endpointslice-controller   endpointslice-controller                ServiceAccount  kube-system
system:controller:generic-garbage-collector  generic-garbage-collector               ServiceAccount  kube-system
system:controller:namespace-controller       namespace-controller                    ServiceAccount  kube-system
system:controller:persistent-volume-binder   persistent-volume-binder                ServiceAccount  kube-system
system:controller:pvc-protection-controller  pvc-protection-controller               ServiceAccount  kube-system
system:controller:statefulset-controller     statefulset-controller                  ServiceAccount  kube-system
system:kube-scheduler                        system:kube-scheduler                   User

$ kubectl who-can get pods -n webinar -o wide
ROLEBINDING            ROLE              NAMESPACE  SUBJECT           TYPE            SA-NAMESPACE
webinar-ns-admin-view  ClusterRole/view  webinar    webinar-ns-admin  ServiceAccount  webinar

CLUSTERROLEBINDING                           ROLE                                                     SUBJECT                                 TYPE            SA-NAMESPACE
cluster-admin                                ClusterRole/cluster-admin                                system:masters                          Group
local-path-provisioner-bind                  ClusterRole/local-path-provisioner-role                  local-path-provisioner-service-account  ServiceAccount  local-path-storage
system:controller:deployment-controller      ClusterRole/system:controller:deployment-controller      deployment-controller                   ServiceAccount  kube-system
system:controller:endpoint-controller        ClusterRole/system:controller:endpoint-controller        endpoint-controller                     ServiceAccount  kube-system
system:controller:endpointslice-controller   ClusterRole/system:controller:endpointslice-controller   endpointslice-controller                ServiceAccount  kube-system
system:controller:generic-garbage-collector  ClusterRole/system:controller:generic-garbage-collector  generic-garbage-collector               ServiceAccount  kube-system
system:controller:namespace-controller       ClusterRole/system:controller:namespace-controller       namespace-controller                    ServiceAccount  kube-system
system:controller:persistent-volume-binder   ClusterRole/system:controller:persistent-volume-binder   persistent-volume-binder                ServiceAccount  kube-system
system:controller:pvc-protection-controller  ClusterRole/system:controller:pvc-protection-controller  pvc-protection-controller               ServiceAccount  kube-system
system:controller:statefulset-controller     ClusterRole/system:controller:statefulset-controller     statefulset-controller                  ServiceAccount  kube-system
system:kube-scheduler                        ClusterRole/system:kube-scheduler                        system:kube-scheduler                   User

Signed-off-by: Daniel Pacak pacak.daniel@gmail.com

[codecov]

Codecov Report

Merging #79 into master will increase coverage by 1.75%.
The diff coverage is 90.14%.

@@            Coverage Diff             @@
##           master      #79      +/-   ##
==========================================
+ Coverage   70.80%   72.55%   +1.75%     
==========================================
  Files           5        6       +1     
  Lines         387      430      +43     
==========================================
+ Hits          274      312      +38     
- Misses         98      103       +5     
  Partials       15       15              

Impacted Files	Coverage Δ
pkg/cmd/list.go	49.50% <0.00%> (-6.94%)	⬇️
pkg/cmd/printer.go	100.00% <100.00%> (ø)

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[lizrice]

I made two picky suggestions for very slightly neater code, but LGTM