flaky test TestResourceGroupTag

## Bug Report

Please answer these questions before submitting your issue. Thanks!

### 1. Minimal reproduce step (Required)

```
resource_tag_test.go:204:
Error Trace: /home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/resource_tag_test.go:204
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/resource_tag_test.go:102
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/rpc.go:72
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/redirector.go:72
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/test_util.go:60
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/client_interceptor.go:58
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/kv_exec_count.go:57
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/client_interceptor.go:59
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/client_collapse.go:74
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/region_request.go:1204
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/region_request.go:1037
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/client_helper.go:146
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/coprocessor.go:1131
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/coprocessor.go:1036
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/coprocessor.go:744
/home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/asm_amd64.s:1594
Error: Not equal:
expected: "b756bca70b2c1aa6100d3941c7d8fe20dc7c5341a59386f10ea01ba085a71e03"
actual : "cc643f77ddc6ed3af9e2e0291eaf3de140b1d86920fc8a56507d30ce73fdad1c"

Diff:
--- Expected
+++ Actual
@@ -1 +1 @@
-b756bca70b2c1aa6100d3941c7d8fe20dc7c5341a59386f10ea01ba085a71e03
+cc643f77ddc6ed3af9e2e0291eaf3de140b1d86920fc8a56507d30ce73fdad1c
Test: TestResourceGroupTag
resource_tag_test.go:218:
Error Trace: /home/jenkins/.tidb/tmp/63a9840cd0739f2c243bb46478607469/sandbox/linux-sandbox/7038/execroot/__main__/bazel-out/k8-fastbuild/bin/executor/executor_test_/executor_test.runfiles/__main__/executor/resource_tag_test.go:218
Error: "0" is not greater than "0"
Test: TestResourceGroupTag
Messages: select a from t use index (idx) where a>1
```

### 2. What did you expect to see? (Required)

### 3. What did you see instead (Required)

### 4. What is your TiDB version? (Required)