[Cloud Security] Fix for Session View Icon Cutoff Issue (elastic#203888)

## Summary

This PR addresses the issue where Session View gets cutoff. The issue
comes from number of Default Action button is not updated after 'Add
Notes' button was introduced. Max amount button should now be 6 instead
of 5
<img width="1192" alt="Screenshot 2024-12-11 at 11 18 11 AM"
src="https://github.com/user-attachments/assets/100f9a9f-1df3-407f-9218-10ea809ab64c"
/>
<img width="956" alt="Screenshot 2024-12-11 at 11 18 21 AM"
src="https://github.com/user-attachments/assets/5f3fa9cb-cd05-49b8-8fe6-4da024ff5290"
/>

x-pack/plugins/security_solution/public/common/components/sessions_viewer/index.test.tsx

@@ -166,19 +166,19 @@ describe('SessionsView', () => {
       ]);
     });
   });
-  it('Action tab should have 4 columns for non Enterprise users', async () => {
+  it('Action tab should have 5 columns for non Enterprise users', async () => {
     render(
       <TestProviders>
         <SessionsView {...testProps} />
       </TestProviders>
     );
 
     await waitFor(() => {
-      expect(mockGetDefaultControlColumn).toHaveBeenCalledWith(4);
+      expect(mockGetDefaultControlColumn).toHaveBeenCalledWith(5);
     });
   });
 
-  it('Action tab should have 5 columns for Enterprise or above users', async () => {
+  it('Action tab should have 6 columns for Enterprise or above users', async () => {
     const licenseServiceMock = licenseService as jest.Mocked<typeof licenseService>;
 
     licenseServiceMock.isEnterprise.mockReturnValue(true);
@@ -189,19 +189,19 @@ describe('SessionsView', () => {
     );
 
     await waitFor(() => {
-      expect(mockGetDefaultControlColumn).toHaveBeenCalledWith(5);
+      expect(mockGetDefaultControlColumn).toHaveBeenCalledWith(6);
     });
   });
 
-  it('Action tab should have 5 columns when accessed via K8S dahsboard', async () => {
+  it('Action tab should have 6 columns when accessed via K8S dahsboard', async () => {
     render(
       <TestProviders>
         <SessionsView {...testProps} tableId={TableId.kubernetesPageSessions} />
       </TestProviders>
     );
 
     await waitFor(() => {
-      expect(mockGetDefaultControlColumn).toHaveBeenCalledWith(5);
+      expect(mockGetDefaultControlColumn).toHaveBeenCalledWith(6);
     });
   });
 });

x-pack/plugins/security_solution/public/common/components/sessions_viewer/index.tsx

@@ -25,6 +25,7 @@ import { useLicense } from '../../hooks/use_license';
 import { eventsDefaultModel } from '../events_viewer/default_model';
 import type { BulkActionsProp } from '../toolbar/bulk_actions/types';
 import { SecurityCellActionsTrigger } from '../cell_actions';
+import { useIsExperimentalFeatureEnabled } from '../../hooks/use_experimental_features';
 
 export const TEST_ID = 'security_solution:sessions_viewer:sessions_view';
 
@@ -120,8 +121,13 @@ const SessionsViewComponent: React.FC<SessionsComponentsProps> = ({
   }, [dispatch, tableId]);
 
   const isEnterprisePlus = useLicense().isEnterprise();
-  const ACTION_BUTTON_COUNT =
-    isEnterprisePlus || tableId === TableId.kubernetesPageSessions ? 5 : 4;
+  const securitySolutionNotesDisabled = useIsExperimentalFeatureEnabled(
+    'securitySolutionNotesDisabled'
+  );
+  let ACTION_BUTTON_COUNT = isEnterprisePlus || tableId === TableId.kubernetesPageSessions ? 6 : 5;
+  if (securitySolutionNotesDisabled) {
+    ACTION_BUTTON_COUNT--;
+  }
   const leadingControlColumns = useMemo(
     () => getDefaultControlColumn(ACTION_BUTTON_COUNT),
     [ACTION_BUTTON_COUNT]