DBButton `describedbyid` Attribute should not be marked as deprecated

[d-koppenhagen]

The DBButton has currently an Attribute called describedbyid which comes form type GlobalProps.
This Attribute is marked with @deprecated but still works.

The property should probably be aligned with other props as already discussed in #4219.
However, I think this property should be removed in the future or replace without an alternative since sometimes you need to give Screenreaders some extra information about the buttons action which is not directly part of the label / ARIA label.

For example if I have a stateful Buttons for pre-selecting transport types (using aria-pressed), I want to tell the used which option al implicitly selected too.