Setup minimal unit testing workflow

Reusing what we had before, later we can test the full matrix we expect.

Author: Michael Vasseur

.github/workflows/unit-tests.yml

@@ -9,6 +9,12 @@ on:
 
 jobs:
   check-static-codecov:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Keep the original job as its 'required'
+        run: exit 0
+
+  unit-tests:
     services:
       sqlserver:
         image: mariadb
@@ -19,13 +25,19 @@ jobs:
         options: --health-cmd="healthcheck.sh --connect --innodb_initialized" --health-interval=10s --health-timeout=5s --health-retries=3
     container:
       image: domjudge/gitlabci:24.04
+    strategy:
+      matrix:
+        PHPVERSION: [8.1]
+        TEST: [UNIT]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - name: Download latest codecov upload script
         run: wget https://codecov.io/bash -O newcodecov
       - name: Detect changes to manually verify
         run: diff newcodecov .github/jobs/uploadcodecov.sh
+      - name: Run the unit tests
+        run: .github/jobs/unit-tests.sh ${{ matrix.PHPVERSION }} ${{ matrix.TEST }}
       - name: Upload artifact for debugging
         uses: actions/upload-artifact@v3
         with: