modules: canopennode: use zephyr/dsp/types.h for float32_t/float64_t

Include the zephyr/dsp/types.h header for float32_t/float64_t type
definitions to avoid conflicts with other subsystems including this header.

Add compile-time asserts to ensure the typedefs meet the requirements of
the CANopenNode module.

Fixes: #63896

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>