samples: canopenmode exclude nvs_sector_size above 64K

This commits is restricting the execution of the
samples/modules/canopennode to board configuration where
the nvs_sector_size is less than 0x10000.
When the CONFIG_CANOPENNODE_STORAGE is selected, the
settings_subsys_init do not accept
nvs_sector_size > UINT16_MAX.
Then all the stm32h723/h743/h745/h750 cannot run the
sample.modules.canopennode testcase

Signed-off-by: Francois Ramu <francois.ramu@st.com>