[wasm] Deprecate WasmModuleObjectBuilderSteraming

This class is just dead code.

Bug: v8:12926
Change-Id: Ic780c0b1bf5b1e517aa919b820fad4ec083d9ef7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3689581Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81169}

include/v8-wasm.h

@@ -219,7 +219,9 @@ class V8_EXPORT WasmStreaming final {
 
 // TODO(mtrofin): when streaming compilation is done, we can rename this
 // to simply WasmModuleObjectBuilder
-class V8_EXPORT WasmModuleObjectBuilderStreaming final {
+class V8_EXPORT V8_DEPRECATE_SOON(
+    "WasmStreaming is used for streaming compilation now.")
+    WasmModuleObjectBuilderStreaming final {
  public:
   explicit WasmModuleObjectBuilderStreaming(Isolate* isolate);
   /**