Remove fakeclient and use testenv for flux cmd tests

Remove use of the fake client, and replace with a real client connected to the
testEnv.

This required fixes to the yaml files as the testEnv has stricter verifcation
of objects. This also meant it was not possible to test a GitRepository with
a missing artifact since that is not a valid state.

The tests are slower than before, taking around 7-10 seconds each because the
 testEnv is setup and destroyed for every test. These will be sped up in a
 follow up PR.

Signed-off-by: Allen Porter <allen@thebends.org>

cmd/flux/trace.go

@@ -89,7 +89,7 @@ func traceCmdRun(cmd *cobra.Command, args []string) error {
 	ctx, cancel := context.WithTimeout(context.Background(), rootArgs.timeout)
 	defer cancel()
 
-	kubeClient, err := rootCtx.kubeManager.NewClient(rootArgs.kubeconfig, rootArgs.kubecontext)
+	kubeClient, err := utils.KubeClient(rootArgs.kubeconfig, rootArgs.kubecontext)
 	if err != nil {
 		return err
 	}