feat: move ssh password auth to dedicated task (#3)

## What ❔
Move task for disabling SSH password auth to dedicated task

## Why ❔
For more transparency

## Checklist

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tasks/main.yml

@@ -3,5 +3,9 @@
   ansible.builtin.include_tasks: firewall.yml
   when: use_predefined_iptables
 
+- name: Disable SSH password auth
+  ansible.builtin.include_tasks: ssh-config.yml
+  when: disable_ssh_password_auth
+
 - name: Prepare configs
   ansible.builtin.include_tasks: provision.yml