Deprecate error types without spans

Errors that do not have spans are not very useful because they do not point at where the error happened. Example is ShellError::IOError. Maybe we should modify all error types to require a span and pass call.head to it as a bare minimum. There might be exceptions where this is not possible but in general I would strive to require spans on as many error types as possible.

Related: nushell/nushell#4326