test(coverage): migrate from tarpaulin to llvm-cov

.github/workflows/test.yml

@@ -17,16 +17,19 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           toolchain: 1.76.0
+      - name: Install cargo-llvm-cov
+        uses: taiki-e/install-action@cargo-llvm-cov
       - name: Run documentation tests
         run: make test-doc
         env:
           MISTRAL_API_KEY: ${{ secrets.MISTRAL_API_KEY }}
       - name: Run tests (with coverage)
-        run: make test-cover
+        run: cargo llvm-cov --lcov --output-path ./lcov.info
         env:
           MISTRAL_API_KEY: ${{ secrets.MISTRAL_API_KEY }}
       - name: Upload tests coverage
         uses: codecov/codecov-action@v4
         with:
           fail_ci_if_error: true
+          files: ./lcov.info
           token: ${{ secrets.CODECOV_TOKEN }}