Existing T6615 Sensor Support -- Set Altitude appears to be a required parameter

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

I need to be able to issue a "set altitude" command to this sensor . I'm not seeing how to do that via the ESPHOME yaml configuration file

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

T6615 API reference says "Set Altitude" is required for accurate measurements - so I'm thinking it needs to be configurable from the esphome YAML configuration file.

**Additional context**

This could be just a documentation issue -- in that the functionality is there, I just don't see how to use it

Start with the ESPHome YAML configuration for the T6615 sensor and compare its available options with the T6615 API reference. Confirm whether Set Altitude is already supported or needs a new configuration option; done means the altitude can be set from YAML and its usage is documented.

Written by the indexing model from the issue text.