Allow remote execution become any user.

[vhsantos]

This PR fix the sudoers.d/user_name configuration to allow the user to run playbooks with others users than root, for example:

- name: Simple playbook demonstrating become and become_user
  hosts: all

  tasks:
    - name: Create a file as the root user (works well)
      ansible.builtin.file:
        path: /tmp/root_file.txt
        state: touch
      become: true
      become_user: root

    - name: Create a file as a different user (dont works, because the users is other than root)
      ansible.builtin.file:
        path: /tmp/www_data_file.txt
        state: touch
      become: true
      become_user: www-data

[adamruzicka]

I'd be a little wary of changing the long established default for everyone. How about instead of hardcoding it to root (or ALL), we would set it to a result of something like this

host_param('remote_execution_deploy_effective_user') || host_param('remote_execution_effective_user') || 'root'

so that the old behaviour stays, but can be overridden by a, possibly global, parameter?

[ekohl]

I'm not sure that's a big deal. If you can become root, you can then run things as any user anyway. Security wise I don't think there's a difference.