feat: add check_mode false to run upgrade tests (#402)

  ansible.builtin.command: k3s --version

  register: k3s_version_output

  changed_when: false

  check_mode: false

- name: Set k3s installed version

  ansible.builtin.set_fact:

    installed_k3s_version: "{{ k3s_version_output.stdout_lines[0].split(' ')[2] }}"

  check_mode: false

# We should be downloading and installing the newer version only if we are in the following case :

#   - the installed version of K3s on the nodes is older than the requested version in ansible vars