ci(create-e2e): disable yarn hardened mode for lockfile creation

Yarn Berry enables hardened mode on public PRs which blocks lockfile
creation (YN0028). Set YARN_ENABLE_HARDENED_MODE=0 so vp create can
generate fresh lockfiles in the e2e test.

Author: fengmk2

.github/workflows/test-vp-create.yml

@@ -172,6 +172,9 @@ jobs:
 
       - name: Run vp create ${{ matrix.template.name }} with ${{ matrix.package-manager }}
         working-directory: ${{ runner.temp }}
+        env:
+          # Yarn Berry enables hardened mode on public PRs, blocking lockfile creation
+          YARN_ENABLE_HARDENED_MODE: '0'
         run: |
           vp create ${{ matrix.template.create-args }} \
             --no-interactive \