ci: fix prep-deps in PRs from external contributors (#23414)

It took a long time but we figured it out, it was running out of memory depending on the state of the cache.

"Two PRs in different fork repos will have different caches"
https://circleci.com/docs/oss/#caching

Author: HowardBraham

.circleci/config.yml

@@ -7,7 +7,7 @@ executors:
     resource_class: small
     environment:
       FONTCONFIG_PATH: /etc/fonts
-      NODE_OPTIONS: --max_old_space_size=1024
+      NODE_OPTIONS: --max_old_space_size=2048
   node-browsers-medium:
     docker:
       - image: cimg/node:20.11-browsers
@@ -377,7 +377,7 @@ jobs:
           command: .circleci/scripts/release-create-release-pr.sh
 
   prep-deps:
-    executor: node-browsers-small
+    executor: node-browsers-medium
     steps:
       - run: *shallow-git-clone
       - run: