[fix] DAC model: Apply STE in Dac.from_latents to match the forward pass (#43820)
* fix(models): Apply STE in DacResidualVectorQuantizer.from_latents
* nit: Add quantizer-level assert to verify matching latents
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Co-authored-by: Anton Vlasjuk <73884904+vasqu@users.noreply.github.com>
Co-authored-by: Eric Bezzam <4757445+ebezzam@users.noreply.github.com>