[Bugfix] Fix platform-specific routing in CustomOp implementations (#24444)

Signed-off-by: Konrad Zawora <kzawora@habana.ai>

vllm/model_executor/layers/vocab_parallel_embedding.py

@@ -399,7 +399,7 @@ class VocabParallelEmbedding(CustomOp):
         param[:loaded_weight.shape[0]].data.copy_(loaded_weight)
         param[loaded_weight.shape[0]:].data.fill_(0)
 
-    def forward(self, input_):
+    def forward_native(self, input_):
         if self.tp_size > 1:
             # Build the mask.
             masked_input, input_mask = get_masked_input_and_mask(
@@ -420,6 +420,9 @@ class VocabParallelEmbedding(CustomOp):
         output = tensor_model_parallel_all_reduce(output_parallel)
         return output
 
+    def forward_cuda(self, input_):
+        return self.forward_native(input_)
+
     def extra_repr(self) -> str:
         s = f"num_embeddings={self.num_embeddings_per_partition}"
         s += f", embedding_dim={self.embedding_dim}"