feat(tts): Implement naive response_format for tts endpoint #6895

Job	Run time
tests-rerankers	2m 51s
tests-sentencetransformers	2m 24s
tests-diffusers	2m 10s
tests-transformers	1m 49s
tests-coqui	4m 23s
tests-openvoice	5m 34s
tests-parler-tts	4m 6s
tests-transformers-musicgen	3m 5s
tests-vallex	2m 55s
	29m 17s

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