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

@@ -69,19 +69,19 @@ func main() {
 
 	if err := actionConfig.Init(settings, false, os.Getenv("HELM_DRIVER"), debug); err != nil {
 		debug("%+v", err)
-		switch e := err.(type) {
-		case pluginError:
-			os.Exit(e.code)
-		default:
 		os.Exit(1)
 	}
-	}
 
 	if err := cmd.Execute(); err != nil {
 		debug("%+v", err)
+		switch e := err.(type) {
+		case pluginError:
+			os.Exit(e.code)
+		default:
 			os.Exit(1)
 		}
 	}
+}
 
 // wordSepNormalizeFunc changes all flags that contain "_" separators
 func wordSepNormalizeFunc(f *pflag.FlagSet, name string) pflag.NormalizedName {