Bluetooth: host: save CF and CCC values written before bonding

On bond establishment: save the CF and CCC data that have been written
before the peer was bonded.

On identity resolved: update the CF data to use the peer's identity address
instead of its private address (same as is currently done for the CCC).

Fixes #54770.

Signed-off-by: Jonathan Rico <jonathan.rico@nordicsemi.no>