Fix #49

Fixes unwanted service startup after installation when the systemd service unit is disabled by a systemd preset. With compat 12 `--skip-systemd-native` is now passed to invoke-rc.d.

Removed `--with systemd` since it was removed since compat 11 - see https://manpages.debian.org/bookworm/debhelper/debhelper-compat-upgrade-checklist.7.en.html

Tested by building the package on Debian 12 with debhelper version 13.11.4. Should theoretically work with debhelper 11.4 or later, according to debhelper changelog at https://launchpad.net/debian/+source/debhelper/11.4

Author: kaistierl

debs/Debian/debian/compat

@@ -1 +1 @@
-9
+12

debs/Debian/debian/rules

@@ -11,7 +11,7 @@ RABBITMQ_GROUP ?= rabbitmq
 unexport DEPS_DIR
 
 %:
-	dh $@ --parallel --with systemd
+	dh $@ --parallel
 
 override_dh_auto_clean:
 	$(MAKE) clean clean-unpacked-source-dist distclean-manpages