Preserve ucx source code in third-party-source

Author: pdrake-nv

docker/common/install_ucx.sh

@@ -8,6 +8,7 @@ UCX_REPO="https://github.com/openucx/ucx.git"
 
 rm -rf ${UCX_INSTALL_PATH}
 git clone --depth 1 -b ${UCX_VERSION} ${UCX_REPO}
+tar -czf /third-party-source/ucx-${UCX_VERSION}.tar.gz ucx
 cd ucx
 ./autogen.sh
 ./contrib/configure-release       \