feat: update merge job to use self-hosted runners for multi-architecture support

Author: chvvkumar

.github/workflows/build-and-release.yml

@@ -197,7 +197,7 @@ jobs:
   merge:
     name: Merge Multi-Arch Image
     needs: [prepare, build]
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted, Linux]
     steps:
       - name: Login to Docker Hub
         uses: docker/login-action@v3

.github/workflows/snd.yml

@@ -75,7 +75,7 @@ jobs:
   merge:
     name: Merge Multi-Arch Image
     needs: build
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted, Linux]
     steps:
       - name: Login to Docker Hub
         uses: docker/login-action@v3