Add and update host variable files for various servers

- Created new host variable file for `iam-nd.oopen.de` with network and cron configurations.
- Created new host variable file for `test.mariadb.oopen.de` with cron environment entries.
- Updated `file-km.anw-km.netz.yml.BAK.2026-04-18-1218` with network interface configurations and DNS settings.
- Modified `gw-campus.oopen.de.yml` to change device names for network interfaces.
- Updated `nd-archiv.warenform.de.yml`, `nd-live.warenform.de.yml`, `nd.warenform.de.yml`, `web0.warenform.de.yml`, `web1.warenform.de.yml`, and `web2.warenform.de.yml` to replace `wkhtmltopdf` with `weasyprint` in the list of extra packages.
- Updated `o26.oopen.de.yml` to correct SSH key destination and change backup job script path.
- Added `iam-nd.oopen.de` to the hosts file for server management.

host_vars/devel-php.wf.netz.yml

@@ -29,6 +29,13 @@
 # vars used by roles/common/tasks/apt.yml
 # ---
 
+apt_install_extra_pkgs: true
+apt_extra_pkgs:
+  - weasyprint
+  - pdftk
+  - subversion
+  - subversion-tools
+
 
 # ---
 # vars used by roles/common/tasks/systemd-resolved.yml