cmd: silence errors and usage for cobra commands

Closes #623.
Refs #2890.

Signed-off-by: Andrey Butusov <andrey@nspcc.io>

cmd/neofs-adm/internal/modules/root.go

@@ -19,8 +19,9 @@ var (
 		Short: "NeoFS Administrative Tool",
 		Long: `NeoFS Administrative Tool provides functions to setup and
 manage NeoFS network deployment.`,
-		RunE:         entryPoint,
-		SilenceUsage: true,
+		RunE:          entryPoint,
+		SilenceUsage:  true,
+		SilenceErrors: true,
 	}
 
 	configFlag = "config"

cmd/neofs-cli/modules/root.go

@@ -44,8 +44,10 @@ It contains commands for interaction with NeoFS nodes using different versions
 of neofs-api and some useful utilities for compiling ACL rules from JSON
 notation, managing container access through protocol gates, querying network map
 and much more!`,
-	Args: cobra.NoArgs,
-	RunE: entryPoint,
+	Args:          cobra.NoArgs,
+	RunE:          entryPoint,
+	SilenceErrors: true,
+	SilenceUsage:  true,
 }
 
 // Execute adds all child commands to the root command and sets flags appropriately.

cmd/neofs-lens/root.go

@@ -15,11 +15,12 @@ import (
 )
 
 var command = &cobra.Command{
-	Use:          "neofs-lens",
-	Short:        "NeoFS Storage Engine Lens",
-	Long:         `NeoFS Storage Engine Lens provides tools to browse the contents of the NeoFS storage engine.`,
-	RunE:         entryPoint,
-	SilenceUsage: true,
+	Use:           "neofs-lens",
+	Short:         "NeoFS Storage Engine Lens",
+	Long:          `NeoFS Storage Engine Lens provides tools to browse the contents of the NeoFS storage engine.`,
+	RunE:          entryPoint,
+	SilenceUsage:  true,
+	SilenceErrors: true,
 }
 
 func entryPoint(cmd *cobra.Command, _ []string) error {