integrations for ceph and migrating to the new charmcraft.yaml

[simskij]

This PR additionally merges our yaml files into charmcraft.yaml.

Issue

Ceph, among other solutions, require embedding of panels and anonymous access.

Solution

Allow anonymous access and embedding of dashboard panels. Configured through juju config, which defaults to disabled.

Context

Testing Instructions

• Enable the configs and try to access Grafana.
• Make a dashboard embeddable and try embedding it somewhere.

Upgrade Notes

N/A

[Abuelodelanada]

LGTM.

Shouldn't we have an integration test that checks you can access a dashboard with anonymous access?

[simskij]

LGTM.

Shouldn't we have an integration test that checks you can access a dashboard with anonymous access?

To me, that feels a little bit like testing the workload, to be honest.