Update topbar-menu.tsx

[alexanmtz]

fixes #1042

This pull request includes a significant refactor of the TopbarMenu component in the frontend/src/components/topbar/topbar-menu.tsx file. The changes focus on simplifying the code by consolidating multiple handler functions into a single array of menu items.

Refactor of TopbarMenu component:

• Removed individual handler functions for each menu item and replaced them with a menuItems array that contains the necessary information for each menu item, including the onClick handler, id, and defaultMessage.
• Updated the JSX to map over the menuItems array and dynamically generate LinkButton components for each item, reducing redundancy and improving maintainability.

These changes streamline the code, making it easier to manage and extend in the future.