Let GnuPG install VS-Nfd.prf and Automatic.prf

* src/inst-kleopatra.nsi: Do not create VS-NfD.prf and Automatic.prf
* src/uninst-kleopatra.nsi: Do not remove them.  Do no Remove the
gnupg directories.

GnuPG now (since 2.2.24) comes with the very same files and thus there
is no more need to create them here or remove gnupg directories.