Small Release workflow clean-up (#16083)

* Consistent usage of `if` statements

Brackets are not required in `if` statements, see https://docs.github.com/en/actions/learn-github-actions/expressions#about-expressions

* Use prepare action to setup pnpm in publish-npm job

.github/workflows/release.yml

@@ -56,7 +56,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: build
     # Skip this step in forks
-    if: ${{ github.repository_owner == 'directus' }}
+    if: github.repository_owner == 'directus'
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
@@ -67,20 +67,10 @@ jobs:
           path: '**/dist'
           key: build-artifacts-${{ github.sha }}
 
-      - name: Install Node.js
-        uses: actions/setup-node@v3
+      - name: Prepare
+        uses: ./.github/actions/prepare
         with:
-          node-version: 16
-
-      - uses: pnpm/action-setup@v2.2.2
-        name: Install pnpm
-        id: pnpm-install
-        with:
-          version: 7
-          run_install: false
-
-      - name: Install dependencies
-        run: pnpm i
+          build: false
 
       - name: Publish packages to NPM
         env:
@@ -131,14 +121,14 @@ jobs:
 
       - name: Login to Docker Hub
         uses: docker/login-action@v2
-        if: ${{ env.DOCKERHUB_IMAGE }}
+        if: env.DOCKERHUB_IMAGE
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_PASSWORD }}
 
       - name: Login to GHCR
         uses: docker/login-action@v2
-        if: ${{ env.GHCR_IMAGE }}
+        if: env.GHCR_IMAGE
         with:
           registry: ghcr.io
           username: ${{ github.actor }}