Use 'eshell-with-handles' when executing an Eshell file

Use 'eshell-with-handles' when executing an Eshell file

This makes sure we close the handles as we should, which is important
for writing the output to an actual file (bug#72857).

* lisp/eshell/em-script.el (esh-cmd): Require this, just to be explicit.
(eshell-execute-file): Use 'eshell-with-handles'.

(cherry picked from commit e97ab1c41332e179939f457cc010a606a5124ff8)