samples: sensors: add a new one for lsm6dso as I2C on I3C bus

This adds some skeleton files to enable using LSM6DSO on I3C bus
while still acting like a I2C device. The new files here are
simply to provide a way to have overlay for each board that
would not conflict with the pure I2C one. Also this is set to
build only because it require external hardware that is not
necessary on the board being tested.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>