Refactor components to app-components

### Description

As decided in the ADR in this PR:

https://github.com/Altinn/app-frontend-react/pull/2593

we will refactor our components into dumb UI components.

Please see the ADR for the reasons for this.

### In scope

For each of our layout components:

1. Create a 'dumb' component in the `/src/app-components` folder
2. The component should receive and display data, receive and display isValid status.
3. The component should not have any dependencies on the rest of the app, it should be able to be moved out of src as a lib at any time.
4. There should remain a slim component inside /layout that resolves the data for the compoment, and communicates with the rest of the app.
5. The functionality should largely remain the same as before, meaning the tests should pass, unless we find improvents.

### Out of scope

_No response_

### Additional Information

_No response_

### Tasks

_No response_

Start by reading the ADR in pull request #2593 and reviewing the existing layout components. For each component, inspect the corresponding paths under /layout and /src/app-components, then check the current tests. Done means dumb UI components receive data and isValid without app dependencies, while slim /layout components resolve data and existing tests continue to pass.

Written by the indexing model from the issue text.