boards: arm: arduino_nano_33_ble: Add support for sense version of board

This commit adds support for the Arduino Nano 33 BLE Sense board.

The DTS is separated into a common dtsi and one DTS for each version
of the board. The sensors with existing drivers: hts221, lps22hb and
apds9960 are added to the DTS of the Sense version.

A startup delay is added to the vdd_env node. This is done to give some
time for the sensors VDD/VCC to go high before the sensor drivers are
initialized.

The functionality was verified using the driver sample of each sensor.

Signed-off-by: Benjamin Björnsson <benjamin.bjornsson@gmail.com>