fix: make multicast tests reusable

.github/workflows/ci.yml

@@ -319,6 +319,10 @@ jobs:
     name: Run integration tests
     uses: ./.github/workflows/integration.yaml
 
+  multicast:
+    name: Run multicast tests
+    uses: ./.github/workflows/multicast.yaml
+
   # NOTE: In GitHub repository settings, the "Require status checks to pass
   # before merging" branch protection rule ensures that commits are only merged
   # from branches where specific status checks have passed. These checks are
@@ -327,7 +331,7 @@ jobs:
   ci:
     name: CI status checks
     runs-on: ubuntu-latest
-    needs: [run_tests, check_format, c99_build, raweth_build, zenoh_build, modular_build, unstable_build, st_build, fragment_test, attachment_test, memory_leak_test, no_router, markdown_lint, build_shared, build_static, integration]
+    needs: [run_tests, check_format, c99_build, raweth_build, zenoh_build, modular_build, unstable_build, st_build, fragment_test, attachment_test, memory_leak_test, no_router, markdown_lint, build_shared, build_static, integration, multicast]
     if: always()
     steps:
       - name: Check whether all jobs pass

.github/workflows/multicast.yaml

@@ -14,12 +14,7 @@
 name: multicast
 
 on:
-  push:
-    branches: ["**"]
-  pull_request:
-    branches: ["**"]
-  schedule:
-    - cron: "0 6 * * 1-5"
+  workflow_call:
 
 jobs:
   build: