fix race condition in declarative table (#15801)

extensions/notebook/src/test/common.ts

@@ -350,6 +350,7 @@ class TestDeclarativeTableComponent extends TestComponentBase implements azdata.
 	setFilter: undefined;
 	data: any[][];
 	columns: azdata.DeclarativeTableColumn[];
+	setDataValues: undefined;
 }
 
 class TestButtonComponent extends TestComponentBase implements azdata.ButtonComponent {

extensions/notebook/src/test/managePackages/managePackagesDialog.test.ts

@@ -186,7 +186,8 @@ describe('Manage Package Dialog', () => {
 			onRowSelected: undefined!,
 			setFilter: undefined!,
 			data: [],
-			columns: []
+			columns: [],
+			setDataValues: undefined!
 		});
 
 		let loadingComponent: () => azdata.LoadingComponent = () => Object.assign({}, componentBase, {