Add composite install and build action

.github/actions/install-build/action.yml

@@ -0,0 +1,39 @@
+name: Install and Build (Composite)
+description: Installs and builds WooCommerce.
+inputs:
+  workflow_cache:
+    required: true
+    description: The workflow cache key.
+  workflow_name:
+    required: true
+    description: The name of the workflow.
+
+runs:
+  using: "composite"
+  steps:
+    - name: Dependency caching
+      uses: actions/cache@v3
+      id: cache-deps
+      with:
+        path: |
+          ~/.pnpm-store
+          ~/.local/share/pnpm/store
+          ~/.cache/composer/files
+        key: ${{ runner.os }}-${{ inputs.workflow_name }}-${{ inputs.workflow_cache }}-${{ hashFiles('**/composer.lock', '**/pnpm-lock.yaml') }}
+
+    - name: Install PNPM
+      run: npm install -g pnpm@^6.24.2
+
+    - name: Install dependencies
+      run: pnpm install
+
+    - name: Install Composer dependencies
+      run: pnpm nx composer-install-no-dev woocommerce
+
+    - name: Setup PHP
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: '7.4'
+
+    - name: Run build
+      run: pnpm nx build woocommerce

.github/workflows/pr-build-and-e2e-tests.yml

@@ -1,5 +1,8 @@
 name: Run tests against PR
-on: pull_request
+on:
+  pull_request:
+  workflow_dispatch:
+
 concurrency: 
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
@@ -9,35 +12,12 @@ jobs:
         name: Runs E2E tests.
         runs-on: ubuntu-20.04
         steps:
-            - name: Checkout code.
-              uses: actions/checkout@v3
-
-            - name: Dependency caching
-              uses: actions/cache@v3
-              id: cache-deps
+            - uses: actions/checkout@v3
+            - name: Install and Build
+              uses: ./.github/actions/install-build
               with:
-                path: |
-                  ~/.pnpm-store
-                  ~/.local/share/pnpm/store
-                  ~/.cache/composer/files
-                key: ${{ runner.os }}-pr-build-and-e2e-tests-${{ secrets.WORKFLOW_CACHE }}-${{ hashFiles('**/composer.lock', '**/pnpm-lock.yaml') }}
-
-            - name: Install PNPM
-              run: npm install -g pnpm@^6.24.2
-
-            - name: Install dependencies
-              run: pnpm install
-
-            - name: Install Composer dependencies
-              run: pnpm nx composer-install-no-dev woocommerce
-
-            - name: Setup PHP
-              uses: shivammathur/setup-php@v2
-              with:
-                php-version: '7.4'
-
-            - name: Run build
-              run: pnpm nx build woocommerce
+                workflow_name: pr-build-and-e2e-tests
+                workflow_cache: ${{ secrets.WORKFLOW_CACHE }}
 
             - name: Load docker images and start containers.
               working-directory: plugins/woocommerce