Add ability to remove packages

python3-psycopg needs to be absent, the netfilter_pkgs array should be copied for this role, eg:

---
postgresql_pkgs:
  - name: bookworm
    pkgs_present:
      - libjson-perl
      - postgresql
      - pwgen
      - python3-psycopg2
    pkgs_absent:
      - python3-psycopg
  - name: jammy
    pkgs_present:
      - libjson-perl
      - postgresql
      - pwgen
      - python3-psycopg2
    pkgs_absent:
      - python3-psycopg
  - name: noble
    pkgs_present:
      - libjson-perl
      - postgresql
      - pwgen
      - python3-psycopg2
    pkgs_absent:
      - python3-psycopg
  - name: trixie
    pkgs_present:
      - libjson-perl
      - postgresql
      - pwgen
      - python3-psycopg2
    pkgs_absent:
      - python3-psycopg
...