Add scrolling to the vertical action items bar

Created by: AlicjaSuska

Part of the tracking issue #16165, RFC 250

Description

Build a carousel that lets users scroll the vertical bar if they have too many action items to fit in one view.

Design details Figma

This issue should cover the following:

• add the bottom arrow if the list of action items is longer than the bar
• add the top arrow that appears when necessary
• add the logic that makes arrows disappear when there is no more content to show on the given side (more details in Figma)
• important: carousel should shift to the next batch of action items when the arrow is clicked (not showing action items one-by-one)
• add hover state and tooltip to the arrows