ci(github): Revert to running funTests in a GitHub action container

Signed-off-by: Sebastian Schuberth <[email protected]>

Author: sschuberth

.github/workflows/build-and-test.yml

@@ -116,13 +116,12 @@ jobs:
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         flags: funTest-non-docker
-  funTest-docker:
+  funTest-docker-build:
     runs-on: ubuntu-22.04
+    outputs:
+      # Map a step output to a job output.
+      test_image_tag: ${{ steps.final.outputs.test_image_tag }}
     steps:
-    - name: Checkout Repository
-      uses: actions/checkout@v4
-      with:
-        submodules: recursive
     - name: Free Disk Space
       uses: ./.github/actions/free-disk-space
     - name: Set up Docker Buildx
@@ -135,28 +134,25 @@ jobs:
         tags: ${{ env.TEST_IMAGE_TAG }}
         target: all-tools
         cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ github.repository_owner }}/ort:cache
-    - name: Setup Gradle
+    - name: Set step output
+      id: final
+      run: echo "test_image_tag=$TEST_IMAGE_TAG" >> "$GITHUB_OUTPUT"
+  funTest-docker:
+    needs: funTest-docker-build
+    runs-on: ubuntu-22.04
+    container:
+      image: ${{ needs.funTest-docker-build.outputs.test_image_tag }}
+      options: --user 1001
+    steps:
+    - name: Checkout Repository
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+    - name: Run functional tests that do require external tools
       uses: gradle/actions/setup-gradle@v3
       with:
         gradle-home-cache-cleanup: true
-    - name: Run functional tests that do require external tools
-      run: |
-        # Change the ownership of the Gradle user home and the workspace to the user in the Docker container.
-        sudo chown -R 1000:1000 /home/runner/.gradle
-        sudo chown -R 1000:1000 ${{ github.workspace }}
-
-        # Run the functional tests in the Docker container.
-        docker run \
-          -v ${{ github.workspace }}:/workspace \
-          -v /home/runner/.gradle:/home/ort/.gradle \
-          -w /workspace \
-          --entrypoint=/bin/sh \
-          ${{ env.TEST_IMAGE_TAG }} \
-          -c "GRADLE_USER_HOME=/home/ort/.gradle ./gradlew --scan -Ptests.include=org.ossreviewtoolkit.plugins.packagemanagers.* funTest jacocoFunTestReport"
-
-        # Change the ownership of the Gradle user home and the workspace back to the user in the GitHub Actions runner.
-        sudo chown -R 1001:121 /home/runner/.gradle
-        sudo chown -R 1001:121 ${{ github.workspace }}
+        arguments: --scan -Ptests.include=org.ossreviewtoolkit.plugins.packagemanagers.* funTest jacocoFunTestReport
     - name: Upload code coverage data
       uses: codecov/codecov-action@v4
       with: