`lighthouse account validator` subcommands are not displaying CLI help text

## Description

Since 5.2.0, `lighthouse account validator` subcommands are not displaying the help text. For example, `lighthouse account validator exit --help` returned:

`error: unexpected argument '--help' found`

Similar for `lighthouse account validator import --help` and other subcommands

## Version

5.2.0 and 5.2.1

I will look into fixing this