Relax restriction that sandboxes cannot add columns (ignore additional columns instead) (#14735)

* Fix metadata for native sandboxes

* Relax the restrictions

* Another fix 



* Revert accidental commit

* Update repro for #14612

Throw an error for differently-typed columns.

Co-authored-by: Nemanja <31325167+nemanjaglumac@users.noreply.github.com>