[bugfix] some bugs maybe fail to run (#896)

### What this PR does / why we need it?
Solve the bug that the graph mode is the same as p and d, and some other
bugs.
### Does this PR introduce _any_ user-facing change?
Wouldn't be
### How was this patch tested?
Follow the end-to-end test

Signed-off-by: ningbenzhe1 <ningbenzhe@huawei.com>

vllm_ascend/worker/mtp_proposer_v1.py

@@ -219,4 +219,4 @@ def prepare_input_kernel(out_ptr: torch.Tensor, cu_query_lens: torch.Tensor,
 
     global_indices_flat = global_indices[mask]
     values_flat = values[mask]
-    out_ptr[global_indices_flat] = values_flat
+    out_ptr[global_indices_flat] = values_flat

vllm_ascend/worker/worker_v1.py

@@ -173,7 +173,7 @@ class NPUWorker(WorkerBase):
         scheduler_output: "SchedulerOutput",
     ) -> Optional[ModelRunnerOutput]:
         output = self.model_runner.execute_model(scheduler_output)
-        return output if self.rank == 0 else None
+        return output if self.is_driver_worker else None
 
     def load_model(self) -> None:
         self.model_runner.load_model()