Bluetooth: ISO: Add additional information for ISO streams

Add all information from the ISO established events
and provide the information in the get_info function.

The use cases of each field heavily depends on what
the ISO streams are used for.

Most, if not all, of the field can be used by the
higher layers to improve quality and/or reliability
of e.g. audio streams that use ISO.

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