feat: ignore deploying preview environment for fork PRs (#4578)

# Description

This PR updates the `package.yml` and `close-pr.yml` workflows so a
preview environment is not created/removed from fork PRs.

**Type of change**

- [x] Improvement (change adding some improvement to an existing
functionality)

**How Has This Been Tested**

Created a PR from fork: #4581

**Checklist**

- [ ] I added relevant documentation
- [x] I followed the style guidelines of this project
- [x] I did a self-review of my code
- [ ] I made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I filled out [the contributor form](https://tally.so/r/n9XrxK)
(see text above)
- [ ] I have added relevant notes to the `CHANGELOG.md` file (See
https://keepachangelog.com/)

.github/workflows/close-pr.yml

@@ -2,31 +2,32 @@ name: Close Pull Request
 
 on:
   pull_request:
-    types: [ closed ]
+    types: [closed]
 
 jobs:
   teardown_pr_environment:
     name: Teardown Cloud Run PR environment
     runs-on: ubuntu-latest
+    if: github.event.pull_request.head.repo.full_name == github.repository
 
     # Grant permissions to `GITHUB_TOKEN` for Google Cloud Workload Identity Provider
     permissions:
       contents: read
       id-token: write
 
     steps:
-      - uses: 'actions/checkout@v3'
+      - uses: "actions/checkout@v3"
 
       - name: Authenticate to Google Cloud
-        uses: 'google-github-actions/auth@v1'
+        uses: "google-github-actions/auth@v1"
         with:
           workload_identity_provider: ${{ secrets.GOOGLE_CLOUD_WIP }}
           service_account: ${{ secrets.GOOGLE_CLOUD_SERVICE_ACCOUNT }}
 
       - name: Set up Cloud SDK
-        uses: 'google-github-actions/setup-gcloud@v1'
+        uses: "google-github-actions/setup-gcloud@v1"
         with:
-          version: '>= 435.0.0'
+          version: ">= 435.0.0"
 
       - name: Remove PR environment if exists
         run: |

.github/workflows/package.yml

@@ -165,6 +165,7 @@ jobs:
     needs: build_quickstart_for_develop_docker_image
     if: |
       !cancelled() &&
+      github.event.pull_request.head.repo.full_name == github.repository &&
       needs.build_quickstart_for_develop_docker_image.result == 'success' &&
       github.event_name == 'pull_request' && github.event.pull_request.draft == false
     with: