Fix missing namespace for GetVirtualMemoryCageDataPageAllocator

Bug: chromium:1218005
Change-Id: I533e9fccc48767f4fccc8746e182682abd36c5e5
Cq-Include-Trybots: luci.v8.try:v8_linux64_heap_sandbox_dbg_ng
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3106387Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Samuel Groß <saelo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76380}

src/api/api.cc

@@ -6050,7 +6050,7 @@ void v8::V8::InitializeExternalStartupDataFromFile(const char* snapshot_blob) {
 const char* v8::V8::GetVersion() { return i::Version::GetVersion(); }
 
 #ifdef V8_VIRTUAL_MEMORY_CAGE
-PageAllocator* GetVirtualMemoryCageDataPageAllocator() {
+PageAllocator* v8::V8::GetVirtualMemoryCageDataPageAllocator() {
   CHECK(i::GetProcessWideVirtualMemoryCage()->is_initialized());
   return i::GetProcessWideVirtualMemoryCage()->GetDataCagePageAllocator();
 }