Bluetooth: host: Fix RPA timeout expiration

Fix RPA timeout expiration when BT_EXT_ADV has been enabled.

Always invalidate the device RPA on RPA timeout.
This RPA is used by the scan roles, and the advertiser that was started
using the bt_le_adv_start API.

Call the RPA expire callback only on advertising sets that are enabled
and not being limited by a timeout and not using the identity address.
On RPA timeout always invalidate the RPA of advertising sets that are
disabled.

Fixes: #51208
Fixes: #51228
Fixes: #51247

Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>