[FOLLOWUP] Use base test to avoid patch everwhere (#1634)

### What this PR does / why we need it?
Use base test to avoid patch everwhere.

Followup here: https://github.com/vllm-project/vllm-ascend/pull/1566

### Does this PR introduce _any_ user-facing change?
No

### How was this patch tested?
ut ci passed

- vLLM version: v0.9.2
- vLLM main:
8d0a01a5f2

Signed-off-by: Yikun Jiang <yikunkero@gmail.com>

tests/ut/base.py

@@ -17,16 +17,13 @@ import unittest
 
 from vllm_ascend.utils import adapt_patch, register_ascend_customop
 
-# fused moe ops test will hit the infer_schema error, we need add the patch
-# here to make the test pass.
-import vllm_ascend.patch.worker.patch_common.patch_utils  # type: ignore[import]  # isort: skip  # noqa
-
 
 class TestBase(unittest.TestCase):
 
-    def setUp(self):
+    def __init__(self, *args, **kwargs):
         # adapt patch by default.
         adapt_patch(True)
         adapt_patch()
         register_ascend_customop()
         super().setUp()
+        super(TestBase, self).__init__(*args, **kwargs)