reorganized GH runner setups

.github/workflows/run-unit-tests.yml

@@ -38,12 +38,16 @@ jobs:
         run: rustup update stable
       - name: Install cargo-llvm-cov
         uses: taiki-e/install-action@cargo-llvm-cov
-      - name: Generate code coverage
-        run: cargo llvm-cov --all-features --workspace --lcov --output-path lcov.info
-      - name: Run doc-tests
+
+      - name: Run doctests
         run: cargo test --doc --all-features --workspace --release
+
+      - name: Run unit tests with code coverage
+        run: cargo llvm-cov --all-features --release --workspace --lcov --output-path lcov.info
+
       - name: Test docs generation
         run: cargo doc --no-deps --release
+
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v3
         with: