Use more up to date ScyllaDB dashboards (#3998)

## Motivation

These also have versions: every time a new ScyllaDB version gets release, they release updated dashboards with it.

## Proposal

Use the dashboards from the versions we're currently using

## Test Plan

Deploy a network and see the updated dashboards.

## Release Plan

- Nothing to do / These changes follow the usual release cycle.

Author: ndr-ds