* chore: replace handmade FakeDashboardService with generated mock
Maintaining a handcrafted FakeDashboardService is not sustainable now that we are in the process of moving the dashboard-related functions out of sqlstore.
* remove dialect global variable
adds toggle to make a dashboard public
* config struct for public dashboard config
* api endpoints for public dashboard configuration
* ui for toggling public dashboard on and off
* load public dashboard config on share modal
Co-authored-by: Owen Smallwood <owen.smallwood@grafana.com>
Co-authored-by: Torkel Ödegaard <torkel@grafana.com>
