8929 move recordindexactionmenu menu inside the recordindexpageheader (#9007)

Closes #8929 

Users with the feature flag `IS_PAGE_HEADER_V2_ENABLED` set to false
will still have the old behavior with the action bar.

To test the PR, test with and without the feature flag.

packages/twenty-front/src/modules/ui/layout/page/components/PageHeader.tsx

@@ -165,7 +165,7 @@ export const PageHeader = ({
         </StyledTopBarIconStyledTitleContainer>
       </StyledLeftContainer>
 
-      <StyledPageActionContainer>
+      <StyledPageActionContainer className="page-action-container">
         {isPageHeaderV2Enabled && hasPaginationButtons && (
           <>
             <IconButton