always use `embed&token_classify` for bge-m3 (#37632)

Signed-off-by: augusto.yjh <augusto.yjh@antgroup.com>
Co-authored-by: wang.yuqi <yuqi.wang@daocloud.io>

tests/plugins/bge_m3_sparse_plugin/bge_m3_sparse_processor/sparse_embeddings_processor.py

@@ -65,21 +65,10 @@ class BgeM3SparseEmbeddingsProcessor(
                 f"Unsupported task {raw_embed_request}, "
                 f"Supported tasks are {EMBED_TASKS}"
             )
-        has_dense_embed = True
-        if raw_embed_request.embed_task == "dense":
-            params.task = "embed"
-            params.skip_reading_prefix_cache = False
-        elif raw_embed_request.embed_task == "sparse":
-            params.task = "token_classify"
-            has_dense_embed = False
-        else:
         params.task = "embed&token_classify"
         params.use_activation = raw_embed_request.use_activation
         if params.use_activation is None:
             params.use_activation = True
-        if not has_dense_embed:
-            params.dimensions = None
-            return params
 
         params.dimensions = raw_embed_request.dimensions
 
@@ -170,8 +159,6 @@ class BgeM3SparseEmbeddingsProcessor(
         raw_request = self._get_sparse_embedding_request(request_id)
         has_dense_embed = raw_request.embed_task in ["dense", "dense&sparse"]
         has_sparse_embed = raw_request.embed_task in ["sparse", "dense&sparse"]
-        embed_dimensions = 0
-        if has_dense_embed:
         embed_dimensions = (
             self.embed_dimensions
             if raw_request.dimensions is None