enhance output instuction when creating cc cluster with legacy config (…

…#4511)

tkg/client/cluster.go

@@ -180,7 +180,7 @@ func (c *TkgClient) CreateCluster(options *CreateClusterOptions, waitForCluster
 			// If `features.cluster.auto-apply-generated-clusterclass-based-configuration` feature-flag is not activated
 			// log command to use to create cluster using ClusterClass based config file and return
 			if !c.IsFeatureActivated(constants.FeatureFlagAutoApplyGeneratedClusterClassBasedConfiguration) {
-				log.Warningf("\nTo create a cluster with it, use")
+				log.Warningf("\nTo create a cluster with it, please use the following command together with all customized flags set in the last step. e.g. --tkr, -v")
 				log.Warningf("    tanzu cluster create --file %v", configFilePath)
 				return false, nil
 			}

tkg/client/cluster_test.go

@@ -403,7 +403,7 @@ ova: []
 
 				result := captureOutput(*tkgClient, options, false)
 				Expect(result).To(ContainSubstring("Legacy configuration file detected. The inputs from said file have been converted into the new Cluster configuration"))
-				Expect(result).To(ContainSubstring("To create a cluster with it, use"))
+				Expect(result).To(ContainSubstring("To create a cluster with it, please use the following command together with all customized flags set in the last step. e.g. --tkr, -v"))
 			})
 
 		})