Support perses dashboards for the community

[friedrichg]

Is your feature request related to a problem? Please describe.
We migrated Cortex Writes in the getting started. But how do we do this for the community,
How are users going to use these dashboards and have them updated easily?

Describe the solution you'd like
Put dashboards in a place where users can easily pull them for the Perses Instances

Additional context
#6669
Do we plan to have perses dashboard in Cortex repo or keep it in a separate repo?

[stale]

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