Clone submodules serially (#669)

This is helpful in DLFW builds where cloning multiple submodules at once
can confuse mitmproxy.

Author: trxcllnt

features/src/rapids-build-utils/devcontainer-feature.json

@@ -1,7 +1,7 @@
 {
   "name": "NVIDIA RAPIDS devcontainer build utilities",
   "id": "rapids-build-utils",
-  "version": "26.4.2",
+  "version": "26.4.3",
   "description": "A feature to install the RAPIDS devcontainer build utilities",
   "containerEnv": {
     "BASH_ENV": "/etc/bash.bash_env"

features/src/rapids-build-utils/opt/rapids-build-utils/bin/tmpl/all.clone.tmpl.sh

@@ -23,7 +23,7 @@ clone_all() {
 
     eval "$(_parse_args --take '-j,--parallel -v,--verbose --no-update-env' "$@" <&0)";
 
-    eval "$(rapids-get-num-archs-jobs-and-load --archs 3 --max-device-obj-memory-usage 1 "$@")";
+    eval "$(rapids-get-num-archs-jobs-and-load --archs 1 --max-device-obj-memory-usage 1 "$@")";
 
     # shellcheck disable=SC1091
     . devcontainer-utils-debug-output 'rapids_build_utils_debug' 'clone-all';