Adjust concurrency group for each npu workflow (#1068)

### What this PR does / why we need it?
Adjust concurrency group for each npu workflow
- for pd and benchmarks share the static-08-01, so only one job can runs
on
- other job one PR/schedule should have only 1 job runs

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

### How was this patch tested?
CI passed

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

.github/workflows/vllm_ascend_test_pd.yaml

@@ -30,9 +30,10 @@ defaults:
   run:
     shell: bash -el {0}
 
+# only 1 job can runs on static-8-01-cards
 concurrency:
-  group: pr-${{ github.event.pull_request.number }}
-  cancel-in-progress: true
+  group: static-8-01-cards
+  cancel-in-progress: false
 
 jobs:
   prefilling-decoding-disaggregation: