desktop: Fix lpoptions for new printer driver

Also, remove AStA handling, they don’t use it any more anyway.

desktop/templates/lpoptions.j2

 {%- if ansible_hostname | regex_replace('[0-9]$', '') == "hoern" or ansible_hostname == "portal" -%}
 Default Hoern_Kopierer Duplex=DuplexNoTumble
-{%- elif ansible_hostname | regex_replace('[0-9]$', '') == "lxc" -%}
-Dest Kopierer_Briefpapier ColorModel=Gray KCRotate=On
-Default Kopierer_BW ColorModel=Gray
 {%- else -%}
 {%- set number = ansible_hostname | regex_replace('^[a-z]*', '') -%}
-Default Kopierer ColorModel=Gray Duplex=DuplexNoTumble OutputBin=MBDWN0{{ number }}
+Default Kopierer ColorModel=Gray Duplex=DuplexNoTumble OutputBin=Mailbox{{ number }}
 {%- endif -%}