[Cases] Fix columns popover flaky tests (elastic#175509)

## Summary

Fixes elastic#174684
Fixes elastic#174683
Fixes elastic#174682

### Checklist

- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios

x-pack/plugins/cases/public/components/all_cases/columns_popover.test.tsx

@@ -13,10 +13,7 @@ import type { AppMockRenderer } from '../../common/mock';
 import { createAppMockRenderer } from '../../common/mock';
 import { ColumnsPopover } from './columns_popover';
 
-// FLAKY: https://github.com/elastic/kibana/issues/174682
-// FLAKY: https://github.com/elastic/kibana/issues/174683
-// FLAKY: https://github.com/elastic/kibana/issues/174684
-describe.skip('ColumnsPopover', () => {
+describe('ColumnsPopover', () => {
   let appMockRenderer: AppMockRenderer;
 
   beforeEach(() => {
@@ -85,7 +82,13 @@ describe.skip('ColumnsPopover', () => {
     );
 
     userEvent.click(await screen.findByTestId('column-selection-popover-button'));
-    userEvent.click(await screen.findByTestId('column-selection-popover-show-all-button'));
+    userEvent.click(
+      await screen.findByTestId('column-selection-popover-show-all-button'),
+      undefined,
+      {
+        skipPointerEventsCheck: true,
+      }
+    );
 
     const onSelectedColumnsChangeCallParams = selectedColumns.map((column) => ({
       ...column,
@@ -108,7 +111,13 @@ describe.skip('ColumnsPopover', () => {
     );
 
     userEvent.click(await screen.findByTestId('column-selection-popover-button'));
-    userEvent.click(await screen.findByTestId('column-selection-popover-hide-all-button'));
+    userEvent.click(
+      await screen.findByTestId('column-selection-popover-hide-all-button'),
+      undefined,
+      {
+        skipPointerEventsCheck: true,
+      }
+    );
 
     await waitFor(() => {
       expect(onSelectedColumnsChange).toHaveBeenCalledWith(