repl: improve error output

1) Currently extra properties on an error will be ignored, if thrown.
   This information will from now on be visible.
2) In case someone threw a non error object it would have resulted in
   `[object Object]`. Instead, the full object will now be visible.
3) Some cases were not detected properly as error before and "Thrown: "
   was visible before. That is now fixed.

PR-URL: https://github.com/nodejs/node/pull/22436
Refs: https://github.com/nodejs/node/issues/20253


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>