test: 改用 linux-arm64-cpu-32-hk runner 验证 arm64 pod template

配套 ascend-ci-deployment 的 config-hk001/container-job-pod-template-arm64-32.yaml
和 linux-arm64-cpu-32-hk runner scale set，而非 amd64 版本。

Author: JavaPythonAIForBAT

.github/actionlint.yaml

@@ -14,7 +14,7 @@ self-hosted-runner:
     - linux-amd64-cpu-4-hk
     - linux-amd64-cpu-8-hk
     - linux-amd64-cpu-16-hk
-    - linux-amd64-cpu-32-hk
+    - linux-arm64-cpu-32-hk
     - linux-arm64-cpu-16
     - linux-aarch64-a2b3-0
     - linux-aarch64-a2b3-1

.github/workflows/_build_test_image.yaml

@@ -16,7 +16,7 @@
 #
 
 # Reusable workflow that exercises the cpu-32-hk buildkitd pipeline end to
-# end: it runs on linux-amd64-cpu-32-hk, relies on the Vault-injected
+# end: it runs on linux-arm64-cpu-32-hk, relies on the Vault-injected
 # buildkitd TLS certs (ca.pem/cert.pem/key.pem) under DOCKER_CONFIG, and
 # drives `buildctl` against the shared buildkitd daemon to build the CI test
 # image. This is a dedicated verification of the ascend-ci-deployment fix
@@ -66,7 +66,7 @@ jobs:
             soc: "ascend910_9391"
             arch: arm64
             mode: device
-            runner: linux-amd64-cpu-32-hk
+            runner: linux-arm64-cpu-32-hk
             vllm_label: main
             vllm_version: ${{ inputs.vllm_main_commit }}
     container: