pnp codegen some suggestions

[uriel-kluk]

[Name]_Interface_Telemetry_SendAll() is poorly written

A chance for buffer overrun and stack corruption
These should not be on the stack as MAX_MESSAGE_SIZE is 512 and these should be
implemented with snprintf instead of sprintf.

File structure

The implementation files are on root but the interfaces are inside utilities. this is confusing

[JerryYangKai]

@uriel-kluk Thanks for your feedback. I will fix these issue in our further released

[jspaith]

Thanks for feedback @uriel-kluk . Like other one I recently closed, I'm closing this as well since it's not our repo directly that can fix and @JerryYangKai is tracking.

[az-iot-builder-01]

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