infra: actions: add test job

.gitea/workflows/gentoo-utils.yml

@@ -76,3 +76,21 @@ jobs:
         run: |
           meson setup -Dfuzz=enabled -Dtests=enabled -Dbuildtype=debugoptimized -Ddocs=enabled build
           meson compile -C build
+
+  # FIXME: Currently this rebuilds everything. Instead we should bring over the build dir from the build job. This will come in handy
+  # when we have multiple build targets and configs. What we have currently is fine until we get lots of builds going
+  test:
+    runs-on: brutalisk
+    needs: [build-oci-image, build]
+    container:
+      image: ${{ vars.REGISTRY_URL }}/${{ gitea.repository }}:${{ needs.build-oci-image.outputs.image_tag }}
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v5
+
+      - name: test
+        run: |
+          meson setup -Dfuzz=enabled -Dtests=enabled -Dbuildtype=debugoptimized -Ddocs=enabled build
+          meson compile -C build
+          ninja test -C build
+