tsctl archive sketches

[jkppr]

Is your feature request related to a problem? Please describe.
With a larger Timesketch setup, over time there can be many searchindex instances opened on the opensearch cluster. It is possible to manually archive a sketch in the UI which will close the searchindex on the opensearch side, limiting the consumption of resources.

Describe the solution you'd like
For an easy clean-up and resource management, I propose a feature in the tsctl admin tool that allows to easily archiving all sketches that are have not been touched for the last X days.

Describe alternatives you've considered
This can also be done with an external script and the API. However, having it integrated into the admin tool makes sense to me.

https://github.com/google/timesketch/blob/master/timesketch/tsctl.py