Chore: Collect elasticsearch version usage stats (#31787) (#32063)

* Chore: Collect elasticsearch version usage stats

* Fix lint error

* use GetDataSources from sqlstore

* Apply review suggestions

* Return error if datasource type is not specified

* Update pkg/services/sqlstore/datasource.go

* fix undefined var

(cherry picked from commit 0c2045109e)

pkg/services/sqlstore/datasource_test.go

@@ -218,7 +218,7 @@ func TestDataAccess(t *testing.T) {
 		require.Equal(t, 0, len(query.Result))
 	})
 
-	t.Run("GetDataSource", func(t *testing.T) {
+	t.Run("GetDataSources", func(t *testing.T) {
 		t.Run("Number of data sources returned limited to 6 per organization", func(t *testing.T) {
 			InitTestDB(t)
 			datasourceLimit := 6
@@ -288,6 +288,49 @@ func TestDataAccess(t *testing.T) {
 			require.Equal(t, numberOfDatasource, len(query.Result))
 		})
 	})
+
+	t.Run("GetDataSourcesByType", func(t *testing.T) {
+		t.Run("Only returns datasources of specified type", func(t *testing.T) {
+			InitTestDB(t)
+
+			err := AddDataSource(&models.AddDataSourceCommand{
+				OrgId:    10,
+				Name:     "Elasticsearch",
+				Type:     models.DS_ES,
+				Access:   models.DS_ACCESS_DIRECT,
+				Url:      "http://test",
+				Database: "site",
+				ReadOnly: true,
+			})
+			require.NoError(t, err)
+
+			err = AddDataSource(&models.AddDataSourceCommand{
+				OrgId:    10,
+				Name:     "Graphite",
+				Type:     models.DS_GRAPHITE,
+				Access:   models.DS_ACCESS_DIRECT,
+				Url:      "http://test",
+				Database: "site",
+				ReadOnly: true,
+			})
+			require.NoError(t, err)
+
+			query := models.GetDataSourcesByTypeQuery{Type: models.DS_ES}
+
+			err = GetDataSourcesByType(&query)
+
+			require.NoError(t, err)
+			require.Equal(t, 1, len(query.Result))
+		})
+
+		t.Run("Returns an error if no type specified", func(t *testing.T) {
+			query := models.GetDataSourcesByTypeQuery{}
+
+			err := GetDataSourcesByType(&query)
+
+			require.Error(t, err)
+		})
+	})
 }
 
 func TestGetDefaultDataSource(t *testing.T) {