CE-3635: Migrate errorpage and links

• Applayout migration was not part of this, but I started with it for another ticket and then needed to change order of tickets. It didn't include any code changes so I decided to keep it.
• Made external link a bit more compliant to internal links, and link buttons more compliant to regular links
• Splitted ButtonProps and LinkProps in a more clear way
• Moved props into the components that should always be the same, like an external link button should always looks the same.
• Had to add wrapper MemoryRouter to Link buttons in stories, since they're acting as links

Test by checking drafts: D&M: ce-deploy-ui!632 (merged) Template: ce-template!27 (merged)