Configure kleopatra with different organization domains

* src/gpg4win.mk.in (KLEOPATRA_APPLICATION_NAME): Remove.
(KLEOPATRA_ORGANIZATION_DOMAIN): New.
* src/Makefile.am (gpg4win_pkg_kleopatra_configure): Remove
-DKLEOPATRA_APPLICATION_NAME option. Add -DKLEOPATRA_ORGANIZATION_DOMAIN
option.

Use different organization domains (instead of different application
names) for kleopatra to allow the different variants of Kleopatra to
run concurrently.

(cherry picked from commit d56e71a318596c95d10fc82bd60a0436407c349b)

• GnuPG-bug-id: T7528