Revert updating Spack because of problem with develop-2024-12-01

Author: adrienbernede

.uberenv_config.json

@@ -4,7 +4,7 @@
     "package_source_dir" : "../..",
     "package_final_phase" : "initconfig",
     "spack_url": "https://github.com/spack/spack.git",
-    "spack_branch": "develop-2024-12-01",
+    "spack_branch": "develop-2024-10-06",
     "spack_activate" : {},
     "spack_configs_path": "scripts/radiuss-spack-configs",
     "spack_packages_path": "scripts/radiuss-spack-configs/packages",