Bluetooth: CSIS: Add bt_csis_client_set_info struct

Several APIs worked on the bt_csis_client_set struct,
which not only included information about a set, but
also a reference to a specific CSIS instance.

A specialized struct only for the set information
is more useful in those scenarios.

Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>
4 files changed