added clone of mambo in the spack-reusable.yml CI

Author: nicolaslg

.github/workflows/spack-reusable.yml

@@ -76,6 +76,7 @@ jobs:
 
           # build test_link and run tests
           cd test_link/
+          git clone https://gitlab.com/franck.ledoux/mambo.git
           cmake -S . -B build
           cmake --build build
           cmake --build build --target test