Add DGR device map support

[pcdiem]

Description:

Add support for the device groups device map. If relays in separate device groups (SO88) is enabled, the map used used to determine which device group changes to the device (relay) state are sent to. The DevGroupDevice command sets which device is assigned to the device group. If a device is not assigned to any device group, no device group updates are sent when the device changes state.

This PR also includes a reduction in the DevGroupSend light channels item code size.

This PR adds 288 bytes of program code.

Related issue (if applicable): fixes #10155

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works on Tasmota core ESP8266 V.2.7.4.9
• The code change is tested and works on Tasmota core ESP32 V.1.0.5-rc6
• I accept the CLA.

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