[CI] Fix apiserver test in image-release process (#1884)

.github/workflows/image-release.yaml

@@ -46,7 +46,7 @@ jobs:
       working-directory: ${{env.working-directory}}
 
     - name: Test
-      run: go test ./...
+      run: go test ./pkg/... ./cmd/... -race -parallel 4
       working-directory: ${{env.working-directory}}
 
     - name: Set up Docker
@@ -128,6 +128,7 @@ jobs:
         run: |
           docker build -t kuberay/security-proxy:${{ steps.vars.outputs.sha_short }} -f experimental/Dockerfile .
           docker save -o /tmp/security-proxy.tar kuberay/security-proxy:${{ steps.vars.outputs.sha_short }}
+        working-directory: ${{env.working-directory}}
 
       - name: Log in to Docker Hub
         uses: docker/login-action@v2