[Cases] Severity flaky test (elastic#176589)

Fixes elastic#176337
Fixes elastic#176336

## Summary

The usual fix. Running 200 times now to see if it works.

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

@@ -14,9 +14,7 @@ import { screen, waitFor } from '@testing-library/react';
 import { waitForEuiPopoverOpen } from '@elastic/eui/lib/test/rtl';
 import { SeverityFilter } from './severity_filter';
 
-// FLAKY: https://github.com/elastic/kibana/issues/176336
-// FLAKY: https://github.com/elastic/kibana/issues/176337
-describe.skip('Severity form field', () => {
+describe('Severity form field', () => {
   const onChange = jest.fn();
   let appMockRender: AppMockRenderer;
   const props = {
@@ -30,28 +28,31 @@ describe.skip('Severity form field', () => {
 
   it('renders', async () => {
     appMockRender.render(<SeverityFilter {...props} />);
-    expect(screen.getByTestId('options-filter-popover-button-severity')).toBeInTheDocument();
-    expect(screen.getByTestId('options-filter-popover-button-severity')).not.toBeDisabled();
+    expect(await screen.findByTestId('options-filter-popover-button-severity')).toBeInTheDocument();
+    expect(await screen.findByTestId('options-filter-popover-button-severity')).not.toBeDisabled();
 
-    userEvent.click(screen.getByRole('button', { name: 'Severity' }));
+    userEvent.click(await screen.findByRole('button', { name: 'Severity' }));
     await waitForEuiPopoverOpen();
 
-    expect(screen.getByRole('option', { name: CaseSeverity.LOW })).toBeInTheDocument();
-    expect(screen.getByRole('option', { name: CaseSeverity.MEDIUM })).toBeInTheDocument();
-    expect(screen.getByRole('option', { name: CaseSeverity.HIGH })).toBeInTheDocument();
-    expect(screen.getByRole('option', { name: CaseSeverity.CRITICAL })).toBeInTheDocument();
-    expect(screen.getAllByRole('option').length).toBe(4);
+    expect(await screen.findByRole('option', { name: CaseSeverity.LOW })).toBeInTheDocument();
+    expect(await screen.findByRole('option', { name: CaseSeverity.MEDIUM })).toBeInTheDocument();
+    expect(await screen.findByRole('option', { name: CaseSeverity.HIGH })).toBeInTheDocument();
+    expect(await screen.findByRole('option', { name: CaseSeverity.CRITICAL })).toBeInTheDocument();
+    expect((await screen.findAllByRole('option')).length).toBe(4);
   });
 
   it('selects the correct value when changed', async () => {
     appMockRender.render(<SeverityFilter {...props} />);
 
-    userEvent.click(screen.getByRole('button', { name: 'Severity' }));
+    userEvent.click(await screen.findByRole('button', { name: 'Severity' }));
     await waitForEuiPopoverOpen();
-    userEvent.click(screen.getByRole('option', { name: 'high' }));
+    userEvent.click(await screen.findByRole('option', { name: 'high' }));
 
     await waitFor(() => {
-      expect(onChange).toHaveBeenCalledWith({ filterId: 'severity', selectedOptionKeys: ['high'] });
+      expect(onChange).toHaveBeenCalledWith({
+        filterId: 'severity',
+        selectedOptionKeys: ['high'],
+      });
     });
   });
 });