feat(dashboard): Let users download full CSV of a table (#15046)

* - Convert SliceHeader to TSX in progress
- Add menu option to download full CSV. Probably will change it

* Add Download Full CSV feature, and tests

* Added more tests, more TS fixes

* Added feature flag

* Update @superset-ui package versions

* Update @superset-ui packages versions

* use backend config instead of hardcoding number of rows

* Update tests

* front end test fix

* Lint fixes and test fixes

superset-frontend/spec/javascripts/dashboard/components/gridComponents/ChartHolder_spec.jsx

@@ -36,6 +36,7 @@ import { sliceId } from 'spec/fixtures/mockChartQueries';
 import dashboardInfo from 'spec/fixtures/mockDashboardInfo';
 import { dashboardLayout as mockLayout } from 'spec/fixtures/mockDashboardLayout';
 import { sliceEntitiesForChart } from 'spec/fixtures/mockSliceEntities';
+import { initialState } from 'spec/javascripts/sqllab/fixtures';
 import { nativeFiltersInfo } from '../../fixtures/mockNativeFilters';
 
 describe('ChartHolder', () => {
@@ -61,6 +62,7 @@ describe('ChartHolder', () => {
 
   function setup(overrideProps) {
     const mockStore = getMockStore({
+      ...initialState,
       sliceEntities: sliceEntitiesForChart,
     });