[BUGFIX] main-sd-bugfix && [UT] add mtp UT (#593)

### What this PR does / why we need it?
The pr will fix some bug about spec decode / MTP
The pr add a mtp e2e UT `test_mtp_correctness.py`

**vllm_ascend/attention/attention.py**
1. add support `self.attn_mask_cache` only has 1 element to cover scene
in which both spec docode and chunked prefill are enabled.

**vllm_ascend/distributed/parallel_state.py**
1. remove 2 assert because spec decode worker would use init_worker
twice

**vllm_ascend/models/deepseek_mtp.py**
1. remove unused params;
2. add support w8a8 in `CustomDeepSeekMTP`

**vllm_ascend/quantization/quant_config.py**
1. use `AscendUnquantizedFusedMoEMethod` instead of
`UnquantizedFusedMoEMethod`

**other**
1. replace `from vllm.logger import init_logger` to `from vllm.logger
import logger` all of the vllm-ascend project



### Does this PR introduce _any_ user-facing change?


### How was this patch tested?

Signed-off-by: mengwei805 <mengwei25@huawei.com>

.github/workflows/vllm_ascend_test.yaml

@@ -161,7 +161,8 @@ jobs:
         if: steps.filter_spec_decode.outputs.speculative_tests_changed == 'true'
         run: |
           if [[ "${{ matrix.os }}" == "linux-arm64-npu-1" ]]; then
-            pytest -sv tests/singlecard/spec_decode
+            pytest -sv tests/singlecard/spec_decode/e2e/test_mtp_correctness.py  # it needs a clean process
+            pytest -sv tests/singlecard/spec_decode --ignore=tests/singlecard/spec_decode/e2e/test_mtp_correctness.py
           fi
 
       - name: Run vllm-project/vllm test for V0 Engine