Core-suggest: Notify screen-readers when results are shown

[skjalgepalg]

Suggestion from @kristofferlium to add an aria-live -section when results are shown as this can go unnoticed for screen-readers

Possible solution: <span aria-live="polite">Søkeresultater vises</span>

Should:

• Trigger when results are shown
• Remove text-content after a few (2?) seconds