Add documentation of how to use AAD auth to `/docs/topics/llm_configuration.ipynb`
_Originally posted by @ekzhu in https://github.com/microsoft/autogen/issues/2879#issuecomment-2153121660_
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Filing this mostly so there's a record somehere.
The report descriptor fixup `uclogic_rdesc_v1_pen_template_arr` sets `Usage (Digitizer)` but the kernel differs between "Digitizer" (for external ta…