drivers: sensor: vl53l0x: add driver support for multiple sensors

Up until now, the vl53l0x driver only supported a single device, ie.
the first entry st,vl53l0x in the device tree. To be able to use
multiple sensors at the same time, create one driver data instance per
vl53l0x node in the device tree. Also split the constant driver config
from the runtime data.

Because the vl53l0x address is only configurable with an I2C command,
and is not persisted if the sensor is rebooted, multiple sensors can
be handled only if either:
- They are on different I2C buses
- Their addresses are coonfigured (by some external code) before
  vl53l0x_init is called

Also use the i2c_dt_spec and gpio_dt_spec APIs, as it makes
the code more concise and readable.

Finally, to distinguish the logs mesages from different sensors,
prefix the text with the sensor name.

Signed-off-by: Titouan Christophe <moiandme@gmail.com>