fix(ansible): remove supabase-groonga from package install list

The supabase-groonga package was moved to pgroonga extension in commit 1f0ed1f,
but Ansible was still trying to install it separately causing build failures.

Author: yvan-sraka

ansible/tasks/stage2-setup-postgres.yml

@@ -100,7 +100,6 @@
       loop:
         - "{{ psql_version }}/bin"
         - pg_prove
-        - supabase-groonga
         - "{{ postgresql_version }}_debug"
         - "{{ postgresql_version }}_src"
       loop_control: