Dashboards: Split GetDashboardVersions method (#49967)

* Split GetDashboarVersions method

* Add sqlstore dialect and tests

* Fix signature of PAtchPreference

* Add GetDialect to sqlstore and remove GetDashboardVersions

* Add GetDialect to db interface

* Implement List

* add deleted test function

* Remove GetDialect from sqlstore interface

* Remove deleted method from mock

* Refactor test

pkg/services/sqlstore/sqlstore.go

@@ -154,6 +154,11 @@ func (ss *SQLStore) Quote(value string) string {
 	return ss.engine.Quote(value)
 }
 
+// GetDialect return the dialect
+func (ss *SQLStore) GetDialect() migrator.Dialect {
+	return ss.Dialect
+}
+
 func (ss *SQLStore) ensureMainOrgAndAdminUser() error {
 	ctx := context.Background()
 	err := ss.WithTransactionalDbSession(ctx, func(sess *DBSession) error {