Check aziot-edge component instead of aziot-identity-service

[yophilav]

Bugfix iotedge check where IoTEdge uses the version of aziot-identity-service as aziot-edge version which results in

‼ aziot-edge package is up-to-date - Warning
Installed IoT Edge daemon has version 1.5.10 but 1.5.3 is the latest stable version available.

even if the latest version of IoT Edge daemon is installed on the machine.

Root cause:

The IoTEdge queries
https://github.com/Azure/azure-iotedge/blob/main/product-versions.json
for the latest info on each of the component. Currently, IoTEdge parses the wrong component instead of getting the version of aziot-edge, it gets aziot-identity-service version. The aziot-identity-service version is then compared against the
aziot-edge installed version if it is the latest version.

Manual test with custom build ID:

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[damonbarry]

Fixes #7353