fix(v3): fix regression on non-zero plugin exist status

Fixes the regression in helm-3.0.0-beta.5 that swallows and rounds any non-zero exit status greater than 1 from a helm plugin to `1`.

This, for example, breaks `helm-diff` which relies on helm able to return `2` when `helm-diff` returned `2`.

Closese #6788

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

cmd/helm/helm.go

@@ -68,6 +68,11 @@ func main() {
 	cmd := newRootCmd(actionConfig, os.Stdout, os.Args[1:])
 
 	if err := actionConfig.Init(settings, false, os.Getenv("HELM_DRIVER"), debug); err != nil {
+		debug("%+v", err)
+		os.Exit(1)
+	}
+
+	if err := cmd.Execute(); err != nil {
 		debug("%+v", err)
 		switch e := err.(type) {
 		case pluginError:
@@ -76,11 +81,6 @@ func main() {
 			os.Exit(1)
 		}
 	}
-
-	if err := cmd.Execute(); err != nil {
-		debug("%+v", err)
-		os.Exit(1)
-	}
 }
 
 // wordSepNormalizeFunc changes all flags that contain "_" separators