Use DEVICE_API macro to initialize FSW's sensors

[cowsed]

Is your feature request related to a problem? Please describe.
The zephyr sensor shell is really helpful for board bring up and general debugging. To let the sensor shell know that you have a sensor declared somewhere, zephyr uses the DEVICE_API macro.

Describe the solution you'd like
replace instances of
static const struct sensor_driver_api YOURNAMEHERE_api = { ... };
with
static DEVICE_API(sensor, bmp388_api) = { ... };
in our drivers/ folder.

This interfaces with zephyrs iterable sections system and allows the sensor shell to know about the device.

Additional context
https://docs.zephyrproject.org/latest/kernel/iterable_sections/index.html

[cowsed]

need to do this for new ms56xx driver too