Explicitly enforce the number or arguments accepted by some wwctl subcommands. #1717

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

internal/app/wwctl/overlay/build/root.go

@@ -13,6 +13,7 @@ var (
 		Long:                  "This command builds overlays for given nodes.",
 		RunE:                  CobraRunE,
 		ValidArgsFunction:     completions.Nodes,
+		Args:                  cobra.ArbitraryArgs,
 	}
 	OverlayNames []string
 	OverlayDir   string

internal/app/wwctl/overlay/list/root.go

@@ -14,6 +14,7 @@ var (
 		RunE:                  CobraRunE,
 		Aliases:               []string{"ls"},
 		ValidArgsFunction:     completions.Overlays,
+		Args:                  cobra.ArbitraryArgs,
 	}
 	ListContents bool
 	ListLong     bool

internal/app/wwctl/overlay/root.go

@@ -20,6 +20,7 @@ var (
 		Use:                   "overlay COMMAND [OPTIONS]",
 		Short:                 "Warewulf Overlay Management",
 		Long:                  "Management interface for Warewulf overlays",
+		Args:                  cobra.NoArgs,
 	}
 )