Add support for MLX90615 IR temperature sensor

**Describe the problem you have/What new integration you would like**

Add support for MLX90615 IR temperature sensor as a new platform.

**Please describe your use case for this integration and alternatives you've tried:**

The MLX90615 is similar to the MLX90614 which is presently supported.

**Additional context**

The MLX90615 is at address 0x5B where the MLX90614 is at address 0x5A. Both devices contain the Ambient temperate at RAM address 0x06 and Object temperature at RAM address 0x07. I would like to see the MLX90615 as a new platform or modify the MLX90614 platform to allow specifying the device address (but the default would be at 0x5A). If the device address can be specified then multiple MLX90614 or MLX90614 devices could exist on the same I2C bus. In that case how to change the device address from the factory default is another problem :-)

Start by locating the existing MLX90614 platform referenced in the request and compare its handling of the 0x5A device address with the MLX90615 requirements. Done means the ambient and object temperature registers at 0x06 and 0x07 work for MLX90615 at 0x5B, with the requested address configuration or a clearly defined new platform.

Written by the indexing model from the issue text.