bluetooth: host: Avoid sending duplicate device to resolving list.

Core v5.3, Vol 4, Part E, 7.8.38
Controller has the option to accept or reject when the same device
is added to RL.
If a remote device has been added to RL before, then local device
change it's advertsing address, and the remote device tries to pair
with the new address, we could end up trying to add the same data to RL.
If a remote device's public/static address is known, this patch deletes
the old entry from RL before adding it.

Signed-off-by: Azizah Ibrahim <azizah.ibrahim@nordicsemi.no>