Zigbee EZSP improvements and reduced logging

[s-hadinger]

Description:

Reduced logging, all logs for features that are now known to work are moved to log_level 3.

Added ZbRouteError message when devices are unreachable (still not clear when these messages appear).

Added ZbParent reporting from routers.

Added specific logging when unhandled ZDO messages are received.

Added I2C GPIOs to the ZBBridge template.

Now a normal start should look like this:

14:44:24 ZIG: Resetting EZSP device
14:44:25 RSL: RESULT = {"ZbState":{"Status":1,"Message":"EFR32 booted","RestartReason":"Power-on","Code":2}}
14:44:25 RSL: RESULT = {"ZbState":{"Status":55,"Version":"6.7.6.0","Protocol":8,"Stack":2}}
14:44:25 RSL: RESULT = {"ZbState":{"Status":3,"Message":"Configured, starting coordinator"}}
14:44:26 ZIG: {"ZbEZSPReceived":"680000"}
14:44:26 ZIG: {"ZbEZSPReceived":"690000XXXXXXXXXX"}
14:44:26 ZIG: {"ZbEZSPReceived":"28000001XXXXXXXXXXXXXXXXXXXXXXXXXXXX"}
14:44:27 ZIG: {"ZbEZSPReceived":"28000001XXXXXXXXXXXXXXXXXXXXXXXXXXXX"}
14:44:27 RSL: RESULT = {"ZbState":{"Status":56,"IEEEAddr":"0x680AE2FFFE6E103B","ShortAddr":"0x0000","DeviceType":1}}
14:44:27 RSL: RESULT = {"ZbState":{"Status":0,"Message":"Started"}}
14:44:27 ZIG: Zigbee started
14:44:27 ZIG: Zigbee devices data in Flash (391 bytes)

Related issue (if applicable): fixes #8583

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.2.7.2.1
• 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