Zigbee startup event triggered after plugins are loaded

[s-hadinger]

Description:

Now the Zigbee startup event are sent after plugins are loaded

19:51:39.364 MQT: tele/tasmota/ZBBridge/RESULT = {"ZbState":{"Status":51,"IEEEAddr":"0x00124B002A2E916B","ShortAddr":"0x0000","DeviceType":7,"DeviceState":9,"NumAssocDevices":2,"AssocDevicesList":["0xE7D6","0x040B"]}}
19:51:39.937 ZIG: Zigbee device information found in File System (12 devices - 616 bytes)
19:51:39.957 ZIG: Zigbee device data in File System (441 bytes)
19:51:39.966 ZIG: ZbLoad '<internal_plugin>' loaded successfully
19:51:40.064 ZIG: ZbLoad 'Aqara_plug.zb' loaded successfully
19:51:40.163 ZIG: ZbLoad 'air_quality.zb' loaded successfully
19:51:40.234 ZIG: ZbLoad 'giex_water.zb' loaded successfully
19:51:40.265 MQT: tele/tasmota/ZBBridge/RESULT = {"ZbState":{"Status":0,"Message":"Started"}}
19:51:40.267 ZIG: Zigbee started

Related issue (if applicable): fixes #21305

Checklist:

• [x] The pull request is done against the latest development branch
• [x] Only relevant files were touched
• [x] Only one feature/fix was added per PR and the code change compiles without warnings
• [x] The code change is tested and works with Tasmota core ESP8266 V.2.7.6
• [x] The code change is tested and works with Tasmota core ESP32 V.3.0.0
• [x] I accept the CLA.

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