Apply a mem reg shutdown patch to the libfabric code for CI testing

Author: biddisco

.cscs-ci/container/deps.Containerfile

@@ -14,6 +14,10 @@ RUN mkdir -p /opt/spack-packages && \
 RUN spack repo remove --scope defaults:base builtin && \
     spack repo add --scope site /opt/spack-packages/repos/spack_repo/builtin
 
+COPY spack/mr_unsubscribe.patch /opt/spack-packages/repos/spack_repo/builtin/packages/libfabric/mr_unsubscribe.patch
+
+RUN sed -i '/patch("nvhpc-symver.patch", when="@1.6.0:1.14.0 %nvhpc")/a\    patch("mr_unsubscribe.patch")' /opt/spack-packages/repos/spack_repo/builtin/packages/libfabric/package.py
+
 ARG SPACK_ENV_FILE
 COPY $SPACK_ENV_FILE /spack_environment/spack.yaml