refactor: capture output by default

This is almost certainly the correct default for Dokku. While it's a BC break and might cause an increase in memory usage, the api is mostly internal and therefore this is safe to use.

plugins/proxy/src/commands/commands.go

@@ -37,9 +37,8 @@ func main() {
 		usage()
 	case "help":
 		result, err := common.CallExecCommand(common.ExecCommandInput{
-			Command:       "ps",
-			Args:          []string{"-o", "command=", strconv.Itoa(os.Getppid())},
-			CaptureOutput: true,
+			Command: "ps",
+			Args:    []string{"-o", "command=", strconv.Itoa(os.Getppid())},
 		})
 		if err == nil && strings.Contains(result.StdoutContents(), "--all") {
 			fmt.Println(helpContent)