RI-7062: Replace EUI sidebar with Redis SideBar (#4660)

* Export the sidebar component
* Use SideBarItem for the existing menu items
* add width and height props to side bar icon
* remove the logo component - wasn't flexible enough to use in this case
* remove the navigation item wrapper
* fix the icon naming to be consistent, remove unneeded icons, make them work for both light and dark themes
* wrap the create cloud component inside sidebar when rendering
* change getIconType function to just iconType
* remove leafIcon, which is a leftover of a previous UI redesign - #2706, Node.tsx file

Author: dantovska