feat(k8s): add a default generated name for create cluster and create pool (#1779)

Co-authored-by: Rémy Léone <[email protected]>

Author: scaleway-bot

cmd/scw/testdata/test-all-usage-k8s-cluster-create-usage.golden

@@ -14,7 +14,7 @@ EXAMPLES:
 
 ARGS:
   [project-id]                                           Project ID to use. If none is passed the default project ID will be used
-  name                                                   The name of the cluster
+  name=<generated>                                       The name of the cluster
   [description]                                          The description of the cluster
   [tags.{index}]                                         The tags associated with the cluster
   version                                                The Kubernetes version of the cluster

cmd/scw/testdata/test-all-usage-k8s-pool-create-usage.golden

@@ -17,7 +17,7 @@ EXAMPLES:
 
 ARGS:
   cluster-id                         The ID of the cluster in which the pool will be created
-  name                               The name of the pool
+  name=<generated>                   The name of the pool
   node-type                          The node type is the type of Scaleway Instance wanted for the pool
   [placement-group-id]               The placement group ID in which all the nodes of the pool will be created
   [autoscaling]                      The enablement of the autoscaling feature for the pool

internal/namespaces/k8s/v1/k8s_cli.go

@@ -237,6 +237,7 @@ func k8sClusterCreate() *core.Command {
 				Required:   true,
 				Deprecated: false,
 				Positional: false,
+				Default:    core.RandomValueGenerator("k8s"),
 			},
 			{
 				Name:       "description",
@@ -1190,6 +1191,7 @@ func k8sPoolCreate() *core.Command {
 				Required:   true,
 				Deprecated: false,
 				Positional: false,
+				Default:    core.RandomValueGenerator("pool"),
 			},
 			{
 				Name:       "node-type",