Explore: Enable Dashboard-like Snapshots

### Discussed in https://github.com/grafana/grafana/discussions/42285 <div type='discussions-op-text'> ^{Originally posted by **bboreham** November 25, 2021} I would like a feature very like snapshot for dashboards, applied to the trace view. Storing every trace for a system consumes a lot of storage, so it is typical to expire them after a short period. However it is also likely that one or two traces can serve as illustration for an incident or optimisation idea, and it would be valuable to preserve them for months. For illustration, this is the panel I get on Grafana Cloud for a dashboard snapshot:  </div>