CodeGen from PR 24652 in Azure/azure-rest-api-specs

[OpenAI.Inference] Adding content filter support (Azure#24652)

* first-pass adding annotation

* FilterResult definitions

* move Filter definitions to common

* cleaning up naming and imports

* adding version headers

* added descriptions to objects

* correct self_harm JSON projection

* Correct to "prompt_annotations"

* "prompt_annotations" for chat, too

* Update specification/cognitiveservices/OpenAI.Inference/models/completions.common.tsp

Co-authored-by: Shawn Fang <[email protected]>

* Add per-choice content_filter_results to /completions

* tsp compile after merge

* recompile with 0.46.0 after today's update

---------

Co-authored-by: Travis Wilson <[email protected]>
Co-authored-by: Shawn Fang <[email protected]>