chore(ci): scope codebuild PR build to aws/aws-cdk

.github/workflows/codebuild-pr-build.yml

@@ -24,65 +24,67 @@
 
 jobs:
   build:
+    # Runner exists only for aws-cdk repo
+    if: github.repository == 'aws/aws-cdk'
     runs-on: codebuild-aws-cdk-github-actions-runner-${{ github.run_id }}-${{ github.run_attempt }}
 
     env:
       PR_BUILD: true
 
     steps:
       - name: Checkout code
         uses: actions/checkout@v5
 
       - name: Setup Node.js
         uses: actions/setup-node@v5
         with:
           node-version: "18"
           cache: "yarn"
 
       - name: Set up Docker
         uses: docker/setup-buildx-action@v3
 
       - name: Load Docker images
         id: docker-cache
         uses: actions/cache/restore@v4
         with:
           path: |
             ~/.docker-images.tar
           key: docker-cache-${{ runner.os }}
 
       - name: Restore Docker images
         if: ${{ steps.docker-cache.outputs.cache-hit }}
         run: docker image load --input ~/.docker-images.tar
 
       - name: Cache build artifacts
         uses: actions/cache@v4
         with:
           path: |
             ~/.s3buildcache
           key: s3buildcache-${{ runner.os }}
 
       - name: Configure system settings
         run: |
           (command -v sysctl || sudo apt-get update && sudo apt-get install -y procps) && \
           sudo sysctl -w vm.max_map_count=2251954
 
       - name: Build
         run: /bin/bash ./build.sh --ci
 
       - name: Run Rosetta
         run: /bin/bash ./scripts/run-rosetta.sh
 
       - name: Check for uncommitted changes
         run: git diff-index --exit-code --ignore-space-at-eol --stat HEAD
 
       - name: Export Docker images
         if: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
         run: docker image save --output ~/.docker-images.tar $(docker image list --format '{{ if ne .Repository "<none>" }}{{ .Repository }}{{ if ne .Tag "<none>" }}:{{ .Tag }}{{ end }}{{ else }}{{ .ID }}{{ end }}')
 
       - name: Cache Docker images
         if: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
         uses: actions/cache/save@v4
         with:
           path: |
             ~/.docker-images.tar
           key: docker-cache-${{ runner.os }}