Bluetooth: controller: Use new ticker feature to get offsets

Updated the 3 places in extended advertising where the ticker was
previously inquired about the expiration of another ticker ID in a
separate mayfly (adv_aux, adv_sync and adv_iso). It will now use the
new ticker feature where another ticker IDs expiration info will be
added to the callback.

Channel map updates are now handled in ticker_cb and applied immediately
if the ticker is not running

Signed-off-by: Troels Nilsson <trnn@demant.com>