Accordian: Should be possible to select aria-level

[PasiVaisanen]

Does the component already exist

• I confirm that I have checked if the component already exists in any of the Green libraries

For which framework/library you are requesting the component

Angular

Description

Currently the area-level is hardcoded to 2, it should be possible to select the area-level depending of the content where the accordian is displayed.

Who will benefit from this feature?

Hard to use a speech reader when we cannot select the area-level.

Anything else?

No response