[enh] container: support multiple registries

Allows to push the manifests to other registries, this allows to push both docker.io and ghcr.io registries.

.github/workflows/container.yml

@@ -117,10 +117,6 @@ jobs:
             os: ubuntu-24.04-arm
             emulation: true
 
-    permissions:
-      # Organization GHCR
-      packages: write
-
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -152,6 +148,10 @@ jobs:
       - build
       - test
 
+    permissions:
+      # Organization GHCR
+      packages: write
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4