mtmd: qwen3 audio support (qwen3-omni and qwen3-asr) (#19441)
* add qwen3a
* wip
* vision ok
* no more deepstack for audio
* convert ASR model ok
* qwen3 asr working
* Apply suggestions from code review
Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>
* nits
* Apply suggestions from code review
Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>
* fix bad merge
* fix multi inheritance
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Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>
