Matter Thermostat: add setpoint step size override for Lennox

[ctowns]

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Type of Change

• WWST Certification Request
  • If this is your first time contributing code:
    • I have reviewed the README.md file
    • I have reviewed the CODE_OF_CONDUCT.md file
    • I have signed the CLA
  • I plan on entering a WWST Certification Request or have entered a request through the WWST Certification console at developer.smartthings.com
• Bug fix
• New feature
• Refactor

Checklist

• I have performed a self-review of my code
• I have commented my code in hard-to-understand areas
• I have verified my changes by testing with a device or have communicated a plan for testing
• I am adding new behavior, such as adding a sub-driver, and have added and run new unit tests to cover the new behavior

Description of Change

Adds overrides to force step size to 0.5 degC for Lennox matter thermostat devices. These devices expect a setpoints in increments of 0.5 degC, and any value sent otherwise will be rounded to the nearest 0.5 deg step. This will make the UI more compatible with this device to prevent the need for the rounding.

Follows the same vendor override model that was already implemented in Matter Switch.

Summary of Completed Tests

Added a unit test (CGAI).
Pending partner test.

[github-actions]

Invitation URL:
https://bestow-regional.api.smartthings.com/invite/WnlL17kJa1jK

[github-actions]

File	Coverage
All files	87%	❌
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/SmartThings/matter-thermostat/src/thermostat_handlers/capability_handlers.lua	86%	❌
/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/thermostat_utils/fields.lua	94%	✅
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/SmartThings/matter-thermostat/src/thermostat_utils/legacy_device_configuration.lua	84%	❌
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/SmartThings/matter-thermostat/src/thermostat_utils/embedded_cluster_utils.lua	48%	❌
/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/device_configuration.lua	89%	❌
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/SmartThings/matter-thermostat/src/init.lua	95%	✅

Minimum allowed coverage is 90%

Generated by 🐒 cobertura-action against a01537e

[github-actions]

Test Results

   73 files  ±0    516 suites  +1   0s ⏱️ ±0s
2 905 tests +1  2 905 ✅ +2  0 💤 ±0  0 ❌  - 1 
4 801 runs  +1  4 801 ✅ +2  0 💤 ±0  0 ❌  - 1 

Results for commit a01537e. ± Comparison against base commit 42a6a23.

♻️ This comment has been updated with latest results.