[Bugfix] fix dcp_only bug and add e2e accuracy test for dcp only and pcp only (#5565)

### What this PR does / why we need it?
[Bugfix] fix dcp_only bug and add e2e accuracy test for dcp only and pcp
only
this pr fix the bug of accuracy test when decode_parallel_size>1 and
prefill_context_parallel_size=1.
### Does this PR introduce _any_ user-facing change?
NO

### How was this patch tested?
- vLLM version: v0.13.0
- vLLM main:
7157596103

---------

Signed-off-by: zhenwenqi2024 <zhenwenqi_2022@qq.com>

vllm_ascend/xlite/xlite_worker.py

@@ -13,6 +13,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+from vllm.v1.worker.workspace import init_workspace_manager
+
 from vllm_ascend.worker.worker import NPUWorker
 from vllm_ascend.xlite.xlite_model_runner import XliteModelRunner
 
@@ -23,4 +25,6 @@ class XliteWorker(NPUWorker):
     def init_device(self):
         """Override init_device to init xlite model runner"""
         self.device = self._init_device()
+        num_ubatches = 1
+        init_workspace_manager(self.device, num_ubatches)
         self.model_runner = XliteModelRunner(self.vllm_config, self.device)