Text Translation: Enable stream style serialization (#29509)

Author: srnagar

specification/translation/Azure.AI.TextTranslation/tspconfig.yaml

@@ -35,7 +35,6 @@ options:
     generate-tests: false
     customization-class: customization/src/main/java/TextTranslationClientBuilderCustomization.java
     flavor: azure
-    stream-style-serialization: false
   "@azure-tools/typespec-ts":
     package-dir: "ai-translation-text-rest"
     generateMetadata: false