[BITV]: Add extra aria labels to several sections

[emoral435]

From #42744, [these] are the places that need aria-labels on. This wil take several different PR's to fix, as some fixes will require libraries being changed, and nextcloud/server being changed as well!

[emoral435]

Now with the library merged - should be done 👍 will close once it gets the a11y28check !

[szaimen]

Not sure if this implementation is correct in settings/user/sharing:

also here:

and all the other sides...

[emoral435]

My bad - once #43064 gets merged, good to be checked 👍