Correlations: Add organization id (#72258)

* Add org_id to correlations

* Add tests

* Allow org_id to be null in case org_id=0 is used

* Create organization to ensure stable id is generated

* Fix linting

* Ensure backwards compatibility

* Add deprecation information

* Migrate correlations indices

* Default org_id when migrating

* Remove redundant default

* Make PK non-nullable

pkg/services/correlations/correlations.go

@@ -110,12 +110,14 @@ func (s CorrelationsService) handleDatasourceDeletion(ctx context.Context, event
 	return s.SQLStore.InTransaction(ctx, func(ctx context.Context) error {
 		if err := s.deleteCorrelationsBySourceUID(ctx, DeleteCorrelationsBySourceUIDCommand{
 			SourceUID: event.UID,
+			OrgId:     event.OrgID,
 		}); err != nil {
 			return err
 		}
 
 		if err := s.deleteCorrelationsByTargetUID(ctx, DeleteCorrelationsByTargetUIDCommand{
 			TargetUID: event.UID,
+			OrgId:     event.OrgID,
 		}); err != nil {
 			return err
 		}