Allow digital_ocean_kubernetes_info to return all clusters if the cluster name is not specified

[elcfd]

SUMMARY

digital_ocean_kubernetes_info can be improved to follow the digital_ocean_droplet_info module where if you do not specify a droplet name all the droplets will be returned.

Implement the same for digital_ocean_kubernetes_info so that if the cluster name is not specified it returns all the clusters

ISSUE TYPE

• Feature Idea

COMPONENT NAME

digital_ocean_kubernetes_info

ADDITIONAL INFORMATION

Matches the Digital Ocean API and also provides the same functionality as the digital_ocean_droplet_info module.

- name: Gather information about all kubernetes clusters
  community.digitalocean.digital_ocean_kubernetes_info:
    oauth_token: "{{ oauth_token }}"