Map dataSourceTypeSearchQuery state from redux to search input.

public/app/features/datasources/NewDataSourcePage.tsx

@@ -70,6 +70,7 @@ function mapStateToProps(state: StoreState) {
   return {
     navModel: getNavModel(state.navIndex, 'datasources'),
     dataSourceTypes: getDataSourceTypes(state.dataSources),
+    dataSourceTypeSearchQuery: state.dataSources.dataSourceTypeSearchQuery,
     isLoading: state.dataSources.isLoadingDataSources,
   };
 }