In December last year was a change introduced, that a file should not be
removed before
tangling (https://lists.gnu.org/r/emacs-orgmode/2021-05/msg00337.html).
In an older bug report
(https://lists.gnu.org/r/emacs-orgmode/2021-05/msg00337.html)
the decision was to remove the file before writing.
I added a variable to switch between both behaviors.

Any feedback or advice is welcome.