feat: add ReplicatedVoiceConfig to VoiceConfig to enable Gemini TTS voice replication#6899

quirogas merged 3 commits intomaingoogleapis/google-cloud-node:mainfrom

owl-bot-copy-packages-google-cloud-aiplatformgoogleapis/google-cloud-node:owl-bot-copy-packages-google-cloud-aiplatformCopy head branch name to clipboard