Move attribution according to the map view's padding

[antoniave]

Issue description

The attributions are shown on the OpenLayers map. However, their positioning does not consider the map view's padding. As the map view's padding is usually used if something covers the map, the attribution is likely to be covered by those elements.

Hence, the attribution should be moved according to the map view's padding.

Validations

• [X] Read and follow our code of conduct
• [X] Read the contributing guidelines
• [X] Check that there isn't already a similar issue

[mbeckem]

Idea:

• Set css variables based on the map view's current padding (i.e. --map-padding-top etc.) in the <MapContainer /> component. Also add a default css rule that positions the attribution based on the current --map-padding-bottom.
• Investigate whether we can reuse these values in the existing implementation of <MapAnchor> to reduce complexcity

[antoniave]

Branch feature/move-attribution