Disable pnpm cache in CI

The Mac cache was trying to load the Linux cache causing massive slowdowns

Author: alexjpwalker

.circleci/config.yml

@@ -81,7 +81,6 @@ commands:
 
   install-node-modules:
     steps:
-      - restore-npm-cache
       - run:
           name: Install pnpm package manager and node modules
           command: |
@@ -90,9 +89,7 @@ commands:
             npm install --global corepack@0.17.0
             corepack enable
             corepack prepare pnpm@10.12.1 --activate
-            pnpm config set store-dir ~/.pnpm-store
             pnpm install
-      - save-npm-cache
 
   install-rust:
     steps: