MI_NRF24: fix payload error, adaptions for HASS

[Staars]

Description:

Related issue:
#9436

Some small adaptions for better cooperation with HASS auto discovery were made, but there is room for improvement and more updates are planned for the next time.

Checklist:

• The pull request is done against the latest dev branch
• Only relevant files were touched
• Only one feature/fix was added per PR.
• The code change is tested and works on Tasmota core ESP8266 V.2.7.4.3
• The code change is tested and works on core ESP32 V.1.12.2
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass