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/accuracy_test.yaml

@@ -62,8 +62,9 @@ defaults:
   run:
     shell: bash -el {0}
 
+# only cancel in-progress runs of the same workflow
 concurrency:
-  group: pr-${{ github.event.pull_request.number }}
+  group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
 jobs: