lua: encode arguments as error payload for ClientError

If we start to encode client error arguments as payload in C it is good
to have same behavior for Lua too. So that for example
`box.error.new(box.error.TUPLE_NOT_FOUND, 'space A', 'index B') will
create error with payload fields 'space' and 'index' with corresponding
values.

Follow up #9109

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