feat: rework act image build

.forgejo/workflows/act_runtime.yaml

@@ -10,20 +10,14 @@ on:
       - ".forgejo/workflows/act_runtime.yaml"
       - "act_runtime/**"
 
-env:
-  TAGS: '{"ubuntu-latest": {"ubuntu:22.04": "22.04-arm64","ubuntu:24.04": "arm64"}}'
-  VERSIONS: '{"ubuntu:22.44": {"llvm": "19"},"ubuntu:24.04": {"llvm": "19"}}'
-
 jobs:
   build_images:
     strategy:
       matrix:
-        os:
-          - ubuntu-latest
-        base:
-          - ubuntu:22.04
-          - ubuntu:24.04
-    runs-on: ${{ matrix.os }}
+        base_tage:
+          - "22.04"
+          - "24.04"
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -42,7 +36,7 @@ jobs:
         with:
           context: "./act_runtime"
           push: true
-          tags: code.icb4dc0.de/infrastructure/images/act_runtime:${{ fromJSON(env.TAGS)[matrix.os][matrix.base] }}
+          platforms: linux/amd64,linux/arm64
+          tags: code.icb4dc0.de/infrastructure/images/act_runtime:${{ matrix.base_tage }}
           build-args: |
-            BASE_IMAGE=${{ matrix.base }}
-            LLVM_VERSION=${{ fromJSON(env.VERSIONS)[matrix.base]["llvm"] }}
+            BASE_IMAGE=ubuntu:${{ matrix.base_tage }}