Args warn is deprecated for newer Ansible

[matus-cuper]

In Ansible

$ ansible --version
ansible [core 2.17.4]

Postgres Initialization is failing https://github.com/triviadata/ansible-postgresql/blob/master/tasks/configure.yml#L154 with error

TASK [anxs.postgresql : PostgreSQL | Initialize the database | RedHat] *******************************************************************************************************
fatal: [my-pg-server]: FAILED! => {"changed": false, "msg": "Unsupported parameters for (ansible.legacy.command) module: warn. Supported parameters include: _raw_params, _uses_shell, argv, chdir, creates, executable, expand_argument_vars, removes, stdin, stdin_add_newline, strip_empty_ends."}

The args.warn parameter was deprecated in Ansible 2.13 and removed in Ansible 2.14 for both ansible.builtin.shell and ansible.builtin.command, it can be safely removed.

[otakup0pe]

Conceptually fine with this, and bumping minimum ansible to 2.13 unless @MrMegaNova objects....

[flotho]

easy code revie
LGTM

[otakup0pe]

sure why not heh. i will try and get galaxy to pull too.