ci: use github runner with matching build target architecture

.github/workflows/aam-backend-service-build-and-publish.yml

@@ -23,7 +23,7 @@ jobs:
       matrix:
         platform:
           - linux/amd64
-          - linux/arm64
+          - linux/arm64 # disabled until carbone/carbone-ee is available as arm64 docker image
         os:
           - ubuntu-latest
           - [ self-hosted, Linux, ARM64 ]
@@ -42,9 +42,6 @@ jobs:
       - name: Checkout repository files
         uses: actions/checkout@v4
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-
       - name: Set up Java
         uses: actions/setup-java@v4
         with: