Regenerate IoT Hub control plane SDK to use new service API version

[timtay-microsoft]

Azure/azure-rest-api-specs#14894

Also adding a simple code generation script for local generation for other service API version increases later that we'll need to regenerate this SDK for

This new service API version is not deployed in every region yet, so this code is not ready to be released, but my team would like it checked in so the nightly built jars can be used for an upcoming bugbash.

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[weidongxu-microsoft]

You can try with one additional option --generate-samples to allow codegen to generate some sample codes for you (from swagger).

[timtay-microsoft]

Good idea