Correct check-mode support declaration

[arth-simon]

Description

After the changes, the code indicates which module supports check_mode and which does not, like demonstrated in the following Ansible Documentation: https://docs.ansible.com/ansible/latest/dev_guide/developing_program_flow_modules.html#declaring-check-mode-support

Issues Resolved

None

Check List

• [x] New functionality includes sanity testing.
  • [X] All sanity tests pass. ($ ansible-test sanity).
  • [x] All unit tests pass.
• [x] New functionality has been documented in the README if applicable.
  • [x] New functionality has been thoroughly documented in the examples (please include helpful comments).