Set setpoint to original value

[HunsupJung]

Check all that apply

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
• [x] Bug fix
• [ ] New feature
• [ ] Refactor

Checklist

• [x] I have performed a self-review of my code
• [ ] I have commented my code in hard-to-understand areas
• [x] 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

There's a issue that if the setpoint is set to a value which is in the deadband range, the setpoint of device isn't set to the value and the setpoint of SmartThings plugin keeps the value. You can refer to below link for detail. https://smartthings.atlassian.net/browse/IOTE-4626

Summary of Completed Tests

[github-actions[bot]]

Channel deleted.

[github-actions[bot]]

Test Results

   64 files    400 suites   0s ⏱️ 1 993 tests 1 993 ✅ 0 💤 0 ❌ 3 433 runs  3 433 ✅ 0 💤 0 ❌

Results for commit be700751.

:recycle: This comment has been updated with latest results.

[github-actions[bot]]

File	Coverage
All files	83%	:x:
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/SmartThings/matter-thermostat/src/embedded-cluster-utils.lua	42%	:x:
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/SmartThings/matter-thermostat/src/init.lua	85%	:x:

Minimum allowed coverage is 90%

Generated by :monkey: cobertura-action against be7007518835f823e6acb92b90fda9ef7217ed22

[nickolas-deboom]

I think the test cases will just need to be updated to expect state_change = true when the capabilities are emitted!

[nickolas-deboom]

I tested this PR using a cooling setpoint of 79 F and heating setpoint of 61 F, and then verified that when the heating setpoint is set to a value within the deadband, 78 F for example, the capability is reset back to 61 F and it reflects in the plugin.