Sentinel One: Dashboard Improvements and fixes

[kcreddy]

1. Currently there are only 2 screenshots, but 5 dashboards. Add more screenshots to manifest.yml, one per dashboard.

   

2. Update Threat dashboard screenshot. It is quite old.

3. Add navigation panels to all dashboards. Use link panels instead of markdown: ssi: migrate dashboard navigation to using links panel widgets #15075

4. Remove [Logs SentinelOne] text from all visualisation titles inside dashboards: https://www.elastic.co/docs/extend/integrations/dashboard-guidelines#_titles_in_visualisations_matter

5. Use new Metrics visualisation instead of Legacy metrics in all dashboards.

6. Add controls to all dashboards.