Update to npm 8, pin in package.json via volta and corepack (#49941)

.github/workflows/update-package-lock.yaml

@@ -16,13 +16,14 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-node@v3
       with:
-        node-version: 14
+        node-version: 16
 
     - name: Configure git and update package-lock.json
       run: |
         git config user.email "typescriptbot@microsoft.com"
         git config user.name "TypeScript Bot"
-        npm install --package-lock-only --ignore-scripts
+        rm package-lock.json
+        npm install --package-lock-only --ignore-scripts # This is a no-op if package-lock.json is present.
         git add -f package-lock.json
         if git commit -m "Update package-lock.json"; then
           git push