Rename linear_attention_type to experimental_attention_variant

Author: chocoded

mcore_adapter/src/mcore_adapter/models/qwen3_next/__init__.py

@@ -198,7 +198,7 @@ def get_lora_conver_op(self, name, pattern_to_conver_ops: dict[str, ConverOp], l
         "layernorm_zero_centered_gamma": True,
         "hetereogenous_dist_checkpoint": True,
         "attention_output_gate": True,
-        "linear_attention_type": "gated_delta_net",
+        "experimental_attention_variant": "gated_delta_net",
     },
     weight_converters=[
         RenameConverOp(hf_names="lm_head.weight", mca_names="output_layer.weight"),