add azure build step

Author: vomba

.github/workflows/buid-vm-image-manual.yml

@@ -74,5 +74,14 @@ jobs:
           PACKER_LOG: 1
           PACKER_VAR_FILES: kubernetes.json
         working-directory: ./images/capi
-      
+
+      - name: build azure image
+        run: make build-azure-sig-ubuntu-2404-gen2
+        env:
+          PACKER_LOG: 1
+          PACKER_VAR_FILES: kubernetes.json
+          AZURE_SUBSCRIPTION_ID: ${{ secrets.AZURE_SUBSCRIPTION_ID}}
+          AZURE_CLIENT_ID: ${{ secrets.AZURE_CLIENT_ID }}
+          AZURE_CLIENT_SECRET: ${{ secrets.AZURE_CLIENT_SECRET }}
+        working-directory: ./images/capi