Fix coverage baseline generation (cfug#2221)

This should fix the baseline coverage generation. It now performs the
exact same tests that the normal flow does.
It seems melos tasks can fail silently, in this case when the package
filter is empty.


### New Pull Request Checklist

- [ ] I have read the
[Documentation](https://pub.dev/documentation/dio/latest/)
- [ ] I have searched for a similar pull request in the
[project](https://github.com/cfug/dio/pulls) and found none
- [ ] I have updated this branch with the latest `main` branch to avoid
conflicts (via merge from master or rebase)
- [ ] I have added the required tests to prove the fix/feature I'm
adding
- [ ] I have updated the documentation (if necessary)
- [ ] I have run the tests without failures
- [ ] I have updated the `CHANGELOG.md` in the corresponding package

### Additional context and info (if any)

<!-- Provide more context and info about the PR. -->

.github/workflows/coverage_base.yml

@@ -33,8 +33,40 @@ jobs:
         run: sudo apt-get update && sudo apt-get install -y squid
       - run: dart pub get
       - uses: bluefireteam/melos-action@v3
+        with:
+          run-bootstrap: false
+      - name: Check satisfied packages
+        run: |
+          dart ./scripts/melos_packages.dart
+          echo $(cat .melos_packages) >> $GITHUB_ENV
+      - name: Melos Bootstrap
+        run: melos bootstrap
+      # Tests
+      - run: ./scripts/prepare_pinning_certs.sh
+      - name: Install proxy for tests
+        run: sudo apt-get update && sudo apt-get install -y squid mkcert
+      - name: Start local httpbun
+        run: |
+          mkcert -install
+          mkcert -cert-file '/tmp/cert.pem' -key-file '/tmp/key.pem' httpbun.local
+          echo '127.0.0.1 httpbun.local' | sudo tee --append /etc/hosts
+          docker run \
+            --name httpbun \
+            --detach \
+            --publish 443:443 \
+            --volume /tmp:/tmp:ro \
+            --env HTTPBUN_TLS_CERT=/tmp/cert.pem \
+            --env HTTPBUN_TLS_KEY=/tmp/key.pem \
+            --pull always \
+            sharat87/httpbun
+          sleep 1
+          curl --fail --silent --show-error https://httpbun.local/any
+      - name: Use httpbun.local for tests
+        run: melos run httpbun:local
       - name: '[Verify step] Test Dart packages [VM]'
         run: melos run test:vm
+      - name: Use httpbun.com for Web/Flutter tests
+        run: melos run httpbun:com
       - name: '[Verify step] Test Dart packages [Chrome]'
         run: melos run test:web:chrome
       - name: '[Verify step] Test Dart packages [Firefox]'

.github/workflows/tests.yml

@@ -112,5 +112,6 @@ jobs:
         with:
           name: code-coverage-results
           path: |
+            coverage/cobertura.xml
             code-coverage-results.md
             pr_number.txt