Exclude 'off' from fanMode capability for Thermostats

[nickolas-deboom]

This change removes Off as a default value from supportedFanModes attribute for the Thermostat device type. Thermostats typically never support turning off the fan, but after switching from thermostatFanMode to fanMode it became an option.

[github-actions]

Invitation URL:
https://bestow-regional.api.smartthings.com/invite/eGM6PAzNyZlA

[github-actions]

Test Results

   71 files    480 suites   0s ⏱️
2 482 tests 2 482 ✅ 0 💤 0 ❌
4 263 runs  4 263 ✅ 0 💤 0 ❌

Results for commit c823475.

[github-actions]

File	Coverage
All files	91%	✅
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/SmartThings/matter-thermostat/src/thermostat_utils/embedded_cluster_utils.lua	95%	✅
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/SmartThings/matter-thermostat/src/thermostat_utils/device_configuration.lua	91%	✅
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/SmartThings/matter-thermostat/src/thermostat_utils/utils.lua	92%	✅
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/SmartThings/matter-thermostat/src/thermostat_utils/legacy_device_configuration.lua	86%	❌
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/SmartThings/matter-thermostat/src/thermostat_handlers/capability_handlers.lua	88%	❌
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/SmartThings/matter-thermostat/src/thermostat_handlers/attribute_handlers.lua	80%	❌
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/SmartThings/matter-thermostat/src/init.lua	98%	✅

Minimum allowed coverage is 90%

Generated by 🐒 cobertura-action against c823475