Switch to pnpm for dependency management (#16019)

Author: mergennachin

.github/workflows/pull.yml

@@ -862,15 +862,24 @@ jobs:
         # Install Node.js and Emscripten
         source .ci/scripts/setup-emscripten.sh
 
+        export PNPM_VERSION=10.24.0
+        
+        curl -fsSL https://get.pnpm.io/install.sh | env PNPM_VERSION=$PNPM_VERSION SHELL="$(which bash)" sh -
+
+        export PNPM_HOME="$HOME/.local/share/pnpm"
+        export PATH="$PNPM_HOME:$PATH"
+
+        pnpm --version
+
         # Test selective build
         bash scripts/build_wasm_tests.sh ${{ matrix.enable-etdump }}
 
         # Install Jest
         cd cmake-out-wasm/extension/wasm/test
-        npm install --save-dev jest
+        pnpm add -D jest@30.2.0 --ignore-scripts
 
         # Run unit test
-        npm test
+        pnpm test
 
   unittest-nxp-neutron:
     uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main