Support external dashboards from custom url

[tabic]

With the current role it is only possible to either download from grafana.com or provide ready to use dashboards in a local directory. This patch adds support for external dashboards templates, for example directly from github.

[tabic]

The tests are failing because of the missing ansible dependency, see https://github.com/ansible-community/ansible-lint/discussions/1150

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[tabic]

still valid

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[SuperQ]

This role has been deprecated in favor of a the grafana-ansible-collection collection.